The opening sequence of notes in a song, usually played by the song's main instrument, to indicate the beginning of the song.
The opening kick of each half of a game of football.
The opening sequence of any event.
The beginning of a musical note or other sound, in which the amplitude rises from zero to an initial peak.
The initial portion of a syllable, preceding the syllable nucleus.
The initial phase of a disease or condition, in which symptoms first become apparent.
A setting about; a beginning.