a character in a nursery rhyme (=an old song or poem for young children) and in the book Through the Looking-Glass by Lewis Carroll, who is like a large egg in shape. The rhyme goes: 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
{i} egg shaped figure in a nursery rhyme; person who is short and fat; person who once dethroned cannot be brought back; thing that at the moment that it is overthrown cannot be restored