Tra từ by heart - Từ điển Oxford Advanced Learner 8th

Từ điển Oxford Advanced Learner 8th

by heart by ˈheart idiom (BrE also off by ˈheart)using only your memory • I've dialled the number so many times I know it by heart. • She's learnt the whole speech off by heart. Main entry: ↑heart_idiom