Etymology From Middle English syngyng; equivalent to sing + -ing.
1
Usually The act of using the voice to produce musical sounds; vocalizing.
2
Informal, Usually Disclosing information, or giving evidence about another.
3
US, Usually A gathering for the purpose of singing shape note songs.
4
Usually A ringing sound in the ears.
I was aware that some one, apparently at a vast distance, was calling me by my Christian name. [...] In the short space it took to cover the road between the path from Hamilton's shop and the first plank of the Combermere Bridge I had thought over half-a-dozen people who might have committed such a solecism, and had eventually decided that it must have been some singing in my ears.1888, Rudyard Kipling, “The Phantom Rickshaw”, in The Phantom 'Rickshaw and Other Tales, Allahabad: A.H. Wheeler and Co., page 13: