adj, verb ·Uncommon ·Advanced level

Definitions

Verb

1. 1
   past participle of unfasten form-of, participle, past

Adjective

1. 1
   Not fastened. not-comparable

Adjective

1. 1
   not tied wordnet
2. 2
   not buttoned wordnet
3. 3
   affording unobstructed entrance and exit; not shut or closed wordnet
4. 4
   not closed or secured wordnet

Synonyms

All synonyms

adriftafloatcleardetachedfloatingfree

Antonyms

All antonyms

tautfastened

Example

More examples

"She didn't notice one of her buttons unfastened."

Etymology

Etymology 1

From un- + fastened.

Etymology 2

From unfasten + -ed.

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