com/dictionary/definite and clear <the definition of a telescope> <her comic genius is beyond definition > b (1) : clarity of visual presentation : distinctness of outline or detail <improve the definition of an image> (2) : clarity especially of musical sound in reproduction c : sharp demarcation of outlines or limits <a jacket with distinct waist definition > Having muscular definition is having a relatively large amount of muscle in proportion to a relatively small amount of fat so that the shapes of the muscles are distinctly outlined and noticeable. The contours of the body are thus not rounded, soft, and smooth, but somewhat angular and hard -- muscular, in short! CJ
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