heart

A muscular organ that pumps blood through the body, traditionally thought to be the seat of emotion.countableuncountable

• […] I did almoſt beleeve, that the motion of the Heart vvas knovvn to God alone: […]

One's feelings and emotions, especially considered as part of one's character.uncountable

• She has a cold heart.

The seat of the affections or sensibilities, collectively or separately, as love, hate, joy, grief, courage, etc.; rarely, the seat of the understanding or will; usually in a good sense; personality.countableuncountable

• a good, tender, loving, bad, hard, or selfish heart
• Her heart was singing.

Compassion.countableuncountable

• If she had any heart she'd forgive me.

Affectioncountableuncountable

• The chorus's singing won the hearts of the audience.

Dispositioncountableuncountable

• They didn't take the remarks in good heart.

Emotional strength that allows one to continue in difficult situations; courage; spirit; a will to compete.countableuncountable

• The team lost, but they showed a lot of heart.
• She put her whole heart into making a go of the business.

Vigorous and efficient activity; power of fertile production; condition of the soil, whether good or bad.countableuncountable

• Both theſe unhappy Soils the Swain forbears, / And keeps a Sabbath of alternate Years: / That the ſpent Earth may gather heart again; / And, better'd by Ceſſation, bear the Grain.

A term of affectionate or kindly and familiar address.archaiccountableuncountable

• Listen, dear heart, we must go now.

Memory.countableobsoleteuncountable

• I know almost every Beatles song by heart.

To be fond of. Often bracketed or abbreviated with a heart symbol.humorousinformaltransitive

• 2006, Susan Reinhardt, Bulldog doesn't have to rely on the kindness of strangers to draw attention, Citizen-Times.com I guess at this point we were supposed to feel elated she'd come to her senses and decided she hearts dogs after all.
• 2008 July 25, "The Media Hearts Obama?", On The Media, National Public Radio

To mark a comment, post, reply, etc., with the heart symbol (❤).transitive

• She hearted my photos of the kids playing with the dogs.

To give heart to; to hearten; to encourage.obsoletetransitive

• […]My cause is hearted; thine hath no less reason.

To fill an interior with rubble, as a wall or a breakwater.transitive

To form a dense cluster of leaves, a heart, especially of lettuce or cabbage.intransitive