when

Fetched 2026-10-26 (cache).

Datamuse reports no synonyms or antonyms for this word.

Adverb

1. {{lb|en|interrogative}} At what time? At which time? Upon which occasion or circumstance? {{non-gloss|Used to introduce direct or indirect questions about time.}}
2. At an earlier time and under different, usually less favorable, circumstances.
3. <!--move to another POS?--> {{lb|en|relative}} At [[which]], on which, [[during]] which: {{non-gloss|often omitted or replaced with ''[[that]]''.}}
4. {{lb|en|fused relative}} The time at, on or during which.
5. {{lb|en|informal|in definitions or explanations}} A circumstance or situation in which.

Conjunction

1. At (or as soon as) that time that; at the (or any and every) time that; <!--(sometimes)--> if.
2. During the time that; {{n-g|at the time of the action of the following clause or participle phrase.}}
3. At [[what]] time; at [[which]] time.
4. [[since|Since]]; given the fact that; [[considering]] that.
5. [[whereas|Whereas]]; [[although]]; at the same time as; in spite of the fact that.

Pronoun

1. {{lb|en|interrogative}} [[what|What]] time; [[which]] time.

Noun

1. The [[time]] at which something happens.

Interjection

1. {{lb|en|often|humorous}} That's enough: {{non-gloss|a command asking someone to stop adding something, especially an ingredient or portion of food or drink; used in, or as if in, literal response to ‘[[say when|Say when]]’.}}
2. {{lb|en|obsolete}} {{n-g|Expressing impatience.}}

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.