Noun
1. a short musical composition with words;
"a successful musical must have at least three good songs"2. a distinctive or characteristic sound;
"the song of bullets was in the air""the song of the wind""the wheels sang their song as the train rocketed ahead"3. the act of singing;
"with a shout and a song they marched up to the gates"4. the characteristic sound produced by a bird;
"a bird will not learn its song unless it hears it at an early age"5. a very small sum;
"he bought it for a song"