open

Fetched 2026-10-26 (cache).

Datamuse reports no synonyms or antonyms for this word.

Adjective

1. {{lb|en|usually|not comparable}} Physically [[unobstructed]], [[uncovered]], etc.
2. Able to be used or interacted with in some way.
3. Not [[hidden]] or [[restricted]].
4. Not [[completed]] or [[finalised]].
5. {{lb|en|mathematics|logic|of a [[formula]]}} Having a [[free]] [[variable]].
6. {{lb|en|mathematics|topology|of a [[set]]}} Which is part of a predefined collection of subsets of <math>X</math>, that defines a [[topological space]] on <math>X</math>.
7. {{lb|en|music|stringed instruments}} Of a [[note]], played without pressing the [[string]] against the [[fingerboard]].
8. {{lb|en|wind instruments}} Of a [[note]], played without closing any [[finger-hole]], [[key]] or [[valve]].
9. {{lb|en|phonetics}} Uttered with a relatively wide opening of the articulating organs; said of [[vowel]]s.
10. {{lb|en|phonetics}} Uttered, as a [[consonant]], with the oral passage simply narrowed without closure.
11. {{lb|en|computing|used before "code"}} [[source code|Source code]] of a computer program that is not within the text of a [[macro]] being generated.{{rfex|en}}
12. {{lb|en|of a multi-word compound}} Having component words separated by spaces, as opposed to being joined together or hyphenated; for example, ''time slot'' as opposed to ''timeslot'' or ''time-slot''.

Verb

1. To make or become physically [[unobstructed]], [[uncovered]], etc.
2. {{lb|en|transitive|intransitive}} To cause or allow a [[gap]] to form or widen.
3. To make or become [[available]] for use or [[interaction]].
4. To [[start]] or [[begin]].
5. {{lb|en|transitive}} To make an [[open relationship]] or [[open marriage|marriage]], i.e., with possible additional relationships.
6. {{lb|en|obsolete}} To [[disclose]]; to [[reveal]]; to [[interpret]]; to [[explain]].

Noun

1. {{lb|en|in the definite}} Open or [[unobstructed]] space; an [[exposed]] [[location]].
2. {{lb|en|in the definite}} [[public|Public]] [[knowledge]] or [[scrutiny]]; [[full]] [[view]].
3. {{lb|en|electronics}} A defect in an [[electrical]] [[circuit]] preventing [[current]] from flowing.
4. A [[sports]] [[event]] in which anybody can [[compete]], especially or originally irrespective of [[amateur]] or [[professional]] status.
5. The act of something being opened, such as an e-mail message.

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