Definition of 断る
- (v5r, vt) to refuse; to reject; to dismiss; to turn down; to decline
彼女は彼のアドバイスを断りそうだ。なぜなら彼女は彼が好きではないからだ。
She is likely to refuse to follow his advice, because she does not like him. - to inform; to give notice; to tell in advance
予め断りますが、今日のブログは面白くないよ〜。
Just to warn you in advance, today's blog is no fun. - to ask leave; to excuse oneself (from)
ジョンは誰にも断らずに、パイを数切れ勝手に取って食べた。
John helped himself to several pieces of pie without asking.