A pair of lines, typically with rhyming end words.
A pair of one-way streets which carry opposing directions of traffic through gridded urban areas.
A pair of two mutually exclusive choices in a dichotomous key.
A musical composition with lyrics for voice or voices, performed by singing.
A low price, especially one under the expected value; chiefly in for a song.
A melodious sound made by a bird, insect, whale or other animal.
An object of derision; a laughing stock.
Poetical composition; poetry; verse.
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.
Any musical composition.
The act or art of singing.