noun A musical composition with lyrics for voice or voices, performed by singing.
Thomas listened to his favorite song on the radio yesterday.
noun Any musical composition.
noun Poetical composition; poetry; verse.
noun The act or art of singing.
noun A melodious sound made by a bird, insect, whale or other animal.
I love hearing the song of canary birds.
noun The distinctive sound that a male bird utters to attract a mate or to protect his territory; contrasts with call; also, similar vocalisations made by female birds.
noun A low price, especially one under the expected value; chiefly in for a song.