noun

• (anatomy) A muscular organ that pumps blood through the body, traditionally thought to be the seat of emotion.
  "[…] I did almoſt beleeve, that the motion of the Heart vvas knovvn to God alone: […]"
• (uncountable) One's feelings and emotions, especially considered as part of one's character.
  "She has a cold heart."
• (archaic) A term of affectionate or kindly and familiar address.
  "Listen, dear heart, we must go now."
• (obsolete, except in the phrase "by heart") Memory.
  "I know almost every Beatles song by heart."

verb

• (transitive, humorous, informal) To be fond of. Often bracketed or abbreviated with a heart symbol.
  "We're but the sum of all our terrors until we heart the dove."
• (transitive) To mark a comment, post, reply, etc., with the heart symbol (❤).
  "She hearted my photos of the kids playing with the dogs."
• (transitive, obsolete) To give heart to; to hearten; to encourage.
  "[…]My cause is hearted; thine hath no less reason."
• (transitive, masonry) To fill an interior with rubble, as a wall or a breakwater.