1. Home
2. Idioms
3. know by heart

know by heart

---

---

know something by heart

Fig. to know something perfectly; to have memorized something perfectly. I know my speech by heart. I went over and over it until I knew it by heart.

See also: heart, know

know/learn something (off) by heart

if you know or learn something, especially a piece of writing, by heart, you know or learn it so that you can remember it perfectly He's my favourite poet. I know several of his poems by heart.

See also: heart, know