The word coherent has several definitions. For example, ii means being logical and consistent in terms of an argument, theory or even policy. An example of its use in a sentence is, 'They failed to build up a coherent economic scheme.'
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what does coherent mean
logically connected; consistent: a coherent argument.
cohering; sticking together: a coherent mass of sticky candies.
having a natural or due agreement of parts; harmonious: a coherent design.
Physics, Optics. of or pertaining to waves that maintain a fixed phase relationship, as in coherent light.