a waterproof raincoat made of rubberized fabric, (Computers) A brand of personal computer featuring an integrated system in which the hardware and system-operating software were designed by or under the control of a single company, the Apple Computer Corporation; among personal computers, distinguished from the IBM-compatible or Intel-based series of computers, UK A raincoat,

a waterproof raincoat made of rubberized fabric, Shortened form of mackintosh, a waterproof raincoat made of rubberized fabric, A mackintosh, proper Shortened form of Macintosh, a brand name for a personal computer