an infinitely or indefinitely great number or amount
4.
optics, photog a point that is far enough away from a lens, mirror, etc, for the light emitted by it to fall in parallel rays on the surface of the lens, etc
5.
physics a dimension or quantity of sufficient size to be unaffected by finite variations
6.
maths the concept of a value greater than any finite numerical value
7.
a distant ideal point at which two parallel lines are assumed to meet
late 14c., from O.Fr. infinité, from L. infinitatem (nom. infinitas) "boundlessness," from infinitus boundless, unlimited" (see infinite). Infinitas used as a loan-translation of Gk. apeiria "infinity," from apeiros "endless."
1. The size of something infinite. Using the word in the context of sets is sloppy, since different infinite sets aren't necessarily the same size cardinality as each other. See also aleph 0 2. The largest value that can be represented in a particular type of variable (register, memory location, data type, whatever). See also minus infinity. [Jargon File] (1994-11-18)