Irradiate

/ɪˈɹeɪdɪət/ adj, verb

adj, verb ·Moderate ·High school level

Meaning at a glance

  • Primary sense: To send out (heat, light, or some other form of radiation) in the form of rays; to radiate.
  • Grammar: irradiate is listed as adj, verb.
  • Nearest alternatives: ablaze, activate, aglow, alight.
  • Useful contrasts: darken, dim, protect from radiation.
  • Usage evidence: So mused I, blind with anger, when in light / apparent, never so refulgent seen, / my mother dawned irradiate on the night, / confessed a Goddess, such her form, and mien / and starry stature of celestial sheen. / With her right hand she grasped me from above, / and thus with roseate lips:

How to use "irradiate"

  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 "irradiate" 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 "irradiate" 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 "irradiate" as the right word for your sentence.

If your draft is formal, technical, persuasive, or sensitive, compare "irradiate" 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 "irradiate" is acting as adj, verb 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 "ablaze" 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 "irradiate", 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

Verb
  1. 1
    To send out (heat, light, or some other form of radiation) in the form of rays; to radiate. literary, poetic, transitive
  2. 2
    expose to radiation wordnet
  3. 3
    To make (someone or something) bright by shining light on them or it; to brighten, to illuminate. literary, often, poetic, transitive

    "Such vvere thy gifts, Pedmálá, ſuch thy povv'r! / For, vvhen thy smile irradiates yon blue fields, / Obſervant Indra ſends the genial ſhovv'r."

  4. 4
    cast rays of light upon wordnet
  5. 5
    To apply radiation other than visible light to (someone or something).; To treat (food) with ionizing radiation to destroy pathogens. literary, poetic, transitive

    "An inherent protection in labeling of the shipping containers will be the prevention of irradiating the commodity again, insuring that the produce has been treated within the safety limits established by the FDA [Food and Drug Administration]."

Show 12 more definitions
  1. 6
    give spiritual insight to; in religion wordnet
  2. 7
    To apply radiation other than visible light to (someone or something).; To treat (a patient, or a cancerous growth or tumour) with radiation. literary, poetic, transitive
  3. 8
    To animate or enliven (one's mood, or soul or spirit). figuratively, literary, often, poetic, transitive

    "[…] I therefore beseech God to give you his grace and blessing, and the influence of his blessed Spirit, that you may subdue and conquer the temperament of your nature, to do all things well-pleasing to him, and that may irradiate and strengthen your souls and direct you in all things, for there is none that teacheth like him."

  4. 9
    To cause (one's face) to look beautiful, happy, or lively; to light up. figuratively, literary, often, poetic, transitive

    "[W]e regarded with awe and reverence the sublime features of Madame Columbus, now irradiated with triumph."

  5. 10
    To decorate (a place) splendidly. figuratively, literary, often, poetic, transitive

    "No vveeping orphan ſavv his father's ſtores / Our ſhrines irradiate, or emblaze the floors; […]"

  6. 11
    To enlighten (someone, their mind, etc.) intellectually or spiritually; to illuminate, to shed light on. figuratively, literary, often, poetic, transitive

    "This book might irradiate your mind"

  7. 12
    To send out (something) as if in the form of rays; to diffuse, to radiate, to shed. figuratively, literary, often, poetic, transitive

    "Mercury in any geniture, if he ſhall be found in Virgo, or Piſces his oppoſite ſigne, and that in the Horoſcope, irradiated by thoſe quartile aspects of Saturne or Mars, the childe ſhall be mad or melancholy."

  8. 13
    To influence (something) as if with rays of heat, light, etc. figuratively, literary, obsolete, poetic, transitive

    "[T]he neighbouring Spermatick Veſſels are irradiated and virtuated by the kidneys, even as the Brain irradiates the lovver Parts, by an inbred property reſembling light."

  9. 14
    To become bright; to brighten, to light up. intransitive, literary, often, poetic
  10. 15
    Often followed by on or upon: to emit rays of light; to shine. intransitive, literary, often, poetic
  11. 16
    To emit something other than light; to radiate. figuratively, intransitive, literary, often, poetic

    "[T]he pleaſures of ſenſe have no reliſh vvhere thou [Jesus] irradiateſt and teſtifieſt vvith our conſcience, that vve are the children of God, and have done thy vvill ſincerely, […]"

  12. 17
    To diverge or be sent out in the form of rays. intransitive, literary, obsolete, often, poetic

    "[…] Moſes by approaching to God in the Mount, had a Communication of Glory or Light from him, vvhich irradiated from his Face vvhen he deſcended from the Mount."

Adjective
  1. 1
    Made brilliant or bright; irradiated, illuminated. literary, poetic

    "There ſeek the Theban Bard, depriv'd of ſight, / VVithin, irradiate vvith prophetic light; […]"

  2. 2
    Made splendid or wonderful. figuratively, literary, poetic

Synonyms

All synonyms
ablazeactivateaglowalightanhydratebeacon

Antonyms

darkendimprotect from radiationshield

Example

"So mused I, blind with anger, when in light / apparent, never so refulgent seen, / my mother dawned irradiate on the night, / confessed a Goddess, such her form, and mien / and starry stature of celestial sheen. / With her right hand she grasped me from above, / and thus with roseate lips:"

Common questions

What does "irradiate" mean?

To send out (heat, light, or some other form of radiation) in the form of rays; to radiate.

What is a synonym for "irradiate"?

Common synonyms include: ablaze, activate, aglow, alight, anhydrate, beacon.

How do you use "irradiate" in a sentence?

So mused I, blind with anger, when in light / apparent, never so refulgent seen, / my mother dawned irradiate on the night, / confessed a Goddess, such her form, and mien / and starry stature of celestial sheen. / With her right hand she grasped me from above, / and thus with roseate lips:

How do you pronounce "irradiate"?

Pronounced /ɪˈɹeɪdɪət/.

Etymology

Etymology 1

From Middle English irradiate (“illuminated, shining”), borrowed from Medieval Latin irradiātus, perfect passive participle of irradiō, from ir- (“against; into; on, upon”) + radiō (“to cause to radiate, irradiate; to emit beams, radiate”), from radius (“ray of light; rod, staff; spoke of a wheel”) + -ō (first conjugation verb-forming suffix) (further etymology uncertain; possibly ultimately from Proto-Indo-European *reh₁t- (“beam; pole; post”)). The adjective is attested earlier than the verb. The English word is analysable as in- (“against; into; on, upon”) + radiate.

Etymology 2

From Middle English irradiate (“illuminated, shining”) (more at etymology 1), see -ate (verb-forming suffix).

More for "irradiate"

Synonyms

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