a large egg-shaped character in a popular nursery rhyme: “Humpty Dumpty sat on a wall.Humpty Dumpty had a great fall.All the king's horses,And all the king's men,Couldn't put Humpty together again.” a large egg-shaped character in Through the Looking Glass by Lewis Carroll who has a strange and clever conversation with Alice.“When I use a word, it means just what I choose it to mean, neither more nor less.”