Definition of magnification noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˌmæɡnɪfɪˈkeɪʃn//
    ; NAmE NAmE//ˌmæɡnɪfɪˈkeɪʃn//
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  1. 1[uncountable] the act of making something look larger The insects were examined under magnification.
  2. 2[countable, uncountable] the degree to which something is made to look larger; the degree to which something is able to make things look larger a magnification of 10 times the actual size high/low magnification The telescope has a magnification of 50.
See the Oxford Advanced American Dictionary entry: magnification