Noun
The most volatile parts of a perfume which are immediately perceived upon its application.
Synonym: head note
Coordinate terms: middle note, base note
(music) The highest note that can be produced by a certain instrument or singer.
(by extension) The best that a person can do; one's finest achievement.
Source: en.wiktionary.orgI can't leave the studio until everything is as it should be. And I can't put a record out unless I am completely happy with it. I never want to be at a signing and hear my album playing and think, 'Oh no, I could have done that top note better.' Katherine Jenkins
They look for the top note to end every song. They don't know what they are singing about. There is no style. Frankie Avalon