[n] (British) informal group singing of popular songs
[n] a regular and monotonous rising and falling intonation
[adj] uttered in a monotonous cadence or rhythm as in chanting; "their chantlike intoned prayers"; "a singsong manner of speaking"
[v] speak, chant, or declaim in a singsong
[v] move as if accompanied by a singsong; "The porters singsonged the travellers' luggage up the mountain"