Definition - A process of language change where the meaning of a word becomes more restricted.

Example -

(1) The word skyline used to refer to any horizon, but now its meaning has narrowed such that it only refers to urban horizons that contains skyscrapers.

(2) The word apple used to denote "all fruit." Now it denotes one species of fruit. This means that when the King James Bible has Eve giving Adam an apple, the term was being used in its older more general sense — thus she might very well have given him a banana.

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