BY HEART: meaning and examples
Today's expression is: to know something by heart
It means: using only your memory
We sometimes say off by heart.
I dialled the number so many times that I know it by heart.
Before the meeting, I have to learn the whole speech off by heart, and I only have one hour.
This expression came up in last Saturday's Breakfast Club and could be translated to Spanish as de memoria.
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Enjoy the rest of your day.