Etymology

change

un- + buckle

Pronunciation

change

Plain form
unbuckle

Third-person singular
unbuckles

Past tense
unbuckled

Past participle
unbuckled

Present participle
unbuckling

  1. (transitive) If you unbuckle something, you separate the two parts of its buckle.
    Please, stay in your seat and do not unbuckle your seatbelt.