`num`

noun, slang

noun, slang ·Uncommon ·College level

Definitions

Noun
  1. 1
    Pound (unit of weight). US

    "3#"

  2. 2
    Number. attributive

    "#3"

  3. 3
    Number. Internet

    "I have collected U.S. Stamps since I was a boy back in the 1950's. At that time there was a low # being printed and it was affordable."

  4. 4
    Hashtag. informal
  5. 5
    In English-language Scrabble, indicates that a word is only found in the British accepted word list and not the North American list.

    "PTERION#"

Synonyms

All synonyms
no.

Example

More examples

"I have collected U.S. Stamps since I was a boy back in the 1950's. At that time there was a low # being printed and it was affordable."

Etymology

Derived from the abbreviation lb for Latin libra (“pound”), via the medieval convention of indicating abbreviations with a bar, ℔.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.