Definition of ISA in English:

ISA

noun

  • (in the UK) an individual savings account, a scheme allowing individuals to hold cash, shares, and unit trusts free of tax on dividends, interest, and capital gains; in 1999 it replaced both personal equity plans (PEPs) and tax-exempt special savings accounts (TESSAs).

Computing
  • Industry standard architecture, a standard for connecting computers and their peripherals:

    [as modifier] ‘an ISA expansion slot’

Origin

Acronym.

Pronunciation:

ISA

/ˈʌɪsə/