1a short poem or other set of words set to music or meant to be sung:a pop song
[mass noun] singing or vocal music:the pilgrims broke into song
a musical composition suggestive of a song.
a poem, especially one in rhymed stanzas:The Song of Hiawatha
[mass noun] archaic poetry.
2 [mass noun] the musical phrases uttered by some birds, whales, and insects, typically forming a recognizable and repeated sequence and used chiefly for territorial defence or for attracting mates.
for a song
informal very cheaply:the place was going for a song
on song
British informal performing well:will Swindon be on song for the new season?
a song and dance
informal, chiefly British
a fuss or commotion:she would be sure to make a song and dance about her aching feet
North American a long explanation that is pointless or deliberately evasive.
