à (Fr.). At, by, for, with, in, to, in the manner of, etc. For expressions beginning with ‘a’ or ‘à’, e.g. a cappella, a tempo, see under their own entries.
‘A 2’ in orch. scores and parts directs (a) 2 instr. that normally play separate parts (e.g. the 2 ob. or 2 fl.) to play in unison, or (b) 2 or more instr. that normally play in unison (e.g. 1st vns.) to divide to play the separate parts provided for them.