Isa.
British Dictionary definitions for isa (1 of 2)
ISA
1
/ aeronautics /
abbreviation for
International Standard Atmosphere
Interim Standard Atmosphere
British Dictionary definitions for isa (2 of 2)
ISA
2
/ (ˈaɪsə) /
n acronym for
individual savings account: a tax-free savings scheme introduced in Britain in 1999