1.heart noun (ORGAN)
A2 [C] the organ in your chest that sends the blood around your body:
He's got a weak/bad heart (= his heart is not healthy).
Isabel's heart was beating fast with fright.
2.
heart noun (EMOTIONS)
B1 [C or U] used to refer to a person's character, or the place within a person where feelings or emotions are considered to come from:
She has a good heart (= she is a kind person).
I love you, and I mean it from the bottom of my heart (= very sincerely).
I love you with all my heart (= very much).
He said he'd never marry but he had a change of heart (= his feelings changed) when he met her.
Homelessness is a subject very close/dear to her heart (= is very important to her and she has strong feelings about it).
He broke her heart (= made her very sad) when he left her for another woman.
It breaks my heart (= makes me feel very sad) to see him so unhappy.
They say he died of a broken heart (= because he was so sad).
old-fashioned It does my heart good (= makes me very happy) to see those children so happy.
His heart leaped (= he suddenly felt very excited and happy) when the phone rang.