Sub

/sʌb/ noun, prep, verb, slang

noun, prep, verb, slang ·Very common ·Middle school level

Meaning at a glance

  • Primary sense: Abbreviation of submarine.
  • Grammar: sub is listed as noun, prep, verb, slang.
  • Nearest alternatives: grinder, hero, hoagie, submarine.
  • Useful contrasts: in-house, inhouse, keep.
  • Usage evidence: I want a sub rosa investigation of the bodies.

How to use "sub"

  1. Start with the primary definition, then check the part of speech before placing the word in a sentence.
  2. Compare nearby synonyms to make sure "sub" carries the exact meaning, tone, and strength you need.
  3. Use the example sentence as a context check. If your sentence uses the word differently, confirm that the grammar still fits.

Meaning check

  • Does the word fit the sentence's grammar?
  • Does it match the intended tone rather than only the dictionary definition?
  • Would a simpler synonym be clearer for the reader?
  • Is there enough surrounding context to prevent ambiguity?

Source and review context

This entry combines structured lexical data with WordToolSet review checks. Definitions, examples, synonyms, and usage notes may come from different source tables, so the page is designed to show evidence from more than one angle before you rely on "sub" in a final draft.

If a word has several senses, prefer the sense that matches your sentence's grammar and surrounding context. A correct definition can still be the wrong choice when the sentence needs a different register, emphasis, or level of specificity.

Before you rely on this definition

Read the first definition as a starting point, then check the example, synonyms, and part of speech before treating "sub" as the right word for your sentence.

If your draft is formal, technical, persuasive, or sensitive, compare "sub" with a nearby alternative so the final choice matches both meaning and reader expectation.

Compare nearby meanings

  • Use synonyms when you need a softer, stronger, simpler, or more specific word.
  • Use antonyms to check the boundary of the meaning and avoid accidental contrast.
  • Use the example sentence to confirm the word behaves naturally in context.
  • Keep the original wording when a replacement adds complexity without improving precision.

Definition decision workflow

1. Identify the role

Check whether "sub" is acting as noun, prep, verb, slang in your sentence. A definition is only useful when the grammar matches the way the word is being used.

2. Test the nearest option

Compare it with "grinder" and other nearby choices to see whether the sentence needs a softer, stronger, or more familiar word.

3. Confirm with context

Use the example sentence below as an evidence check, then read your own sentence out loud to catch tone or rhythm problems.

Review note: Definition pages are checked for source coverage, sentence evidence, synonym support, and editorial insight before they are treated as approval-ready pages. If the evidence is too thin, the page remains available to users but is kept out of the approval-facing indexed inventory.

Final meaning check

Before publishing a sentence with "sub", ask whether the word helps the reader understand the idea faster. A precise word should reduce confusion, not simply make the sentence look more polished.

When the definition, synonym evidence, and example context point in the same direction, the word is usually a safer choice. When they conflict, revise the sentence or choose a clearer alternative.

Definitions

Noun
  1. 1
    Abbreviation of submarine. abbreviation, alt-of

    "You know, we got Russian subs creepin' around; anythin' goes wrong they can say whatever they want happened! Give their folks medals!"

  2. 2
    a submersible warship usually armed with torpedoes wordnet
  3. 3
    Clipping of submarine sandwich: a sandwich made on a long bun. abbreviation, alt-of, clipping

    "We can get subs at that deli."

  4. 4
    a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States wordnet
  5. 5
    Clipping of submersible. abbreviation, alt-of, clipping
Show 15 more definitions
  1. 6
    Clipping of substitute, often in sports or teaching. abbreviation, alt-of, clipping, informal

    "With the score 4 to 1, they brought in subs."

  2. 7
    Clipping of subscription (“a payment made for membership of a club, etc.”). British, abbreviation, alt-of, clipping, informal, often, plural

    "According to the best available information, GALAXY has several times as many subs as any other science fiction magazine!"

  3. 8
    Clipping of subtitle Internet, abbreviation, alt-of, clipping, informal

    "I've just noticed a mistake in the subs for this film."

  4. 9
    Clipping of subroutine (sometimes one that does not return a value, as distinguished from a function, which does) abbreviation, alt-of, clipping

    "The default accessor can be overridden by declaring a sub of the same name in the package."

  5. 10
    Clipping of subeditor abbreviation, alt-of, clipping, colloquial
  6. 11
    Clipping of subcontractor abbreviation, alt-of, clipping, colloquial

    "Evoking the train of power that enables effective government, [historian Ramsay MacMullen] wrote: “At every point of connection the original intent must be transmitted as it was received. Otherwise it will come to nothing.” Control and accountability are the bedrock. Control: Who makes the decisions and who decides whether they will be executed—and for whose benefit? Accountability: Who determines whether something has gone wrong, and who determines whether the problem is fixed? In a privatized world, government becomes “diffuse, unstable, unpredictable,” and the skein of responsibility more and more attenuated. Contractors hire subcontractors, who hire subcontractors of their own. “I can’t tell you about the sub to the sub to the sub,” a NATO official told The New York Times in 2010 when asked about convoy guards in Afghanistan who turned out to be in league with the Taliban. Throughout much of our spun-off government today, “the sub to the sub to the sub” is almost a job description."

  7. 12
    Clipping of subwoofer abbreviation, alt-of, clipping, slang
  8. 13
    Clipping of submission (of a work for publication). abbreviation, alt-of, clipping, colloquial
  9. 14
    Clipping of submissive abbreviation, alt-of, clipping, informal

    "[…] roleplay where a sub or bottom takes care of a top's bodily and hygiene needs […]"

  10. 15
    Clipping of subordinate abbreviation, alt-of, clipping, colloquial, dated
  11. 16
    Clipping of subaltern abbreviation, alt-of, clipping, colloquial, dated

    "He was known as 'Mad Carew' by the subs at Khatmandu, He was hotter than they felt inclined to tell; But for all his foolish pranks, he was worshipped in the ranks, And the Colonel's daughter smiled on him as well."

  12. 17
    Clipping of subscription (or (by extension) a subscriber) to an online channel or feed. Internet, abbreviation, alt-of, clipping, colloquial

    "I'm totally stoked; just got 10 new subs after my last video."

  13. 18
    Clipping of subsistence money, part of a worker's wages paid before the work is finished. abbreviation, alt-of, clipping, colloquial
  14. 19
    Clipping of subreddit. Internet, abbreviation, alt-of, clipping
  15. 20
    Clipping of subject (“particular area of study”) Philippines, abbreviation, alt-of, clipping, colloquial
Verb
  1. 1
    To substitute for. US, informal
  2. 2
    To coat with a layer of adhering material; to planarize by means of such a coating.
  3. 3
    be a substitute wordnet
  4. 4
    To work as a substitute teacher, especially in primary and secondary education. US, informal
  5. 5
    To prepare (a slide) with a layer of transparent substance to support and/or fix the sample.

    "1997, Marina A. Lynch, S. M. O'Mara (editors), Ali D. Hames, D. Rickwood (series editors), Neuroscience Labfax, page 166, Ensure that gloves are worn when handling subbed slides. Although the following protocol describes subbing with gelatin, slides may also be coated with either 3-(triethoxysilyl-)propylamine (TESPA) or poly-L-lysine for in situ hybridization."

Show 7 more definitions
  1. 6
    To replace (a player) with a substitute. British, informal

    "He never really made a contribution to the match, so it was no surprise when he was subbed at half time."

  2. 7
    To bring on (a player) as a substitute. British, informal, often, uncommon

    "He was subbed on half way through the second half, and scored within minutes."

  3. 8
    To perform the work of a subeditor or copy editor; to subedit. British
  4. 9
    To subtitle (usually a film or television program). Internet, slang, transitive
  5. 10
    To lend (a person) money. UK, slang, transitive

    "I kept up the pleasantries as we were drying our hands and, realizing I didn't have any change for the lodger, I asked him, one drummer to another like, if he could sub me a quid for the dish."

  6. 11
    To subscribe. intransitive, slang
  7. 12
    To take a submissive role.

    "You've never subbed before. Jessica will be expecting a man on stage that follows orders and enjoys what she's going to be doing. Do you want to be spanked? Possibly whipped?"

Preposition
  1. 1
    Under.

Synonyms

All synonyms
grinderherohoagiesubmarinesubmarine sandwichact for

Antonyms

in-houseinhousekeepleave unchanged

Example

"I want a sub rosa investigation of the bodies."

Common questions

What does "sub" mean?

Abbreviation of submarine.

What is a synonym for "sub"?

Common synonyms include: grinder, hero, hoagie, submarine, submarine sandwich, act for.

How do you use "sub" in a sentence?

I want a sub rosa investigation of the bodies.

How do you pronounce "sub"?

Pronounced /sʌb/.

Etymology

Etymology 1

* Shortened form of any of various words beginning with sub-.

Etymology 2

From Latin sub.

More for "sub"

Synonyms

Next best steps

Find stronger synonymsBrowse writing guidesExplore topic clusters