Definition of IMAX in English:

IMAX

noun

trademark
  • [mass noun] A technique of widescreen cinematography which produces an image approximately ten times larger than that from standard 35 mm film.

    [as modifier] ‘IMAX cinemas’

Origin

1960s: from i- (probably representing a pronunciation of eye) + max (short for maximum).

Pronunciation:

IMAX

/ˈʌɪmaks/