English Dictionary

for once

prep_phrase

(idiomatic) For the first time, after many instances to the contrary; in a rare exception to the rule; as an exception to the usual.

For once, I arrived early to the meeting.

意味（1）

(idiomatic) For the first time, after many instances to the contrary; in a rare exception to the rule; as an exception to the usual.

The invitation for the next evening was accepted, and Cecilia, for once, felt no repugnance to joining the company.