(n.) A few measures added beyond the natural termination of a composition.

PS Parthian shot Z accession accessory accompaniment addenda addendum additament addition additive additory additum adjunct adjuvant affix afterthought allonge anacrusis annex annexation apodosis appanage appendage appendant appendix appurtenance appurtenant attachment augment augmentation back matter bass passage bourdon bridge burden cadence catastrophe ceasing cessation chorus codicil colophon commentary complement conclusion concomitant consequence consummation continuance continuation corollary crack of doom culmination curtain curtains death decease denouement destination destiny development division doom double take dying words effect enclitic end end point ending envoi epilogue eschatology expiration exposition extension extrapolation fate figure final solution final twitch final words finale finality finis finish fixture folderol follow-through follow-up goal harmonic close increase increment infix interlineation interlude intermezzo interpolation introductory phrase izzard last last breath last gasp last things last trumpet last words latter end marginalia measure movement musical phrase musical sentence note offshoot omega ornament part parting shot passage payoff pendant period peroration phrase postface postfix postlude postscript prefix proclitic quietus refrain reinforcement resolution response resting place rider ritornello scholia second thought section sequel sequela sequelae sequelant sequent sequitur side effect side issue stanza statement stoppage stopping place strain subscript suffix supplement swan song tag tail tailpiece term terminal termination terminus tutti tutti passage undergirding variation verse windup