Definition of controlled vocabulary in English:

controlled vocabulary

noun

  • 1A limited range of words used in teaching a person (now especially a child) to read at a particular level, with new items gradually being introduced as reading skills advance.

  • 2(In information science) a prescribed set of terms which may be used in abstracting, indexing, etc., and which is recognized within that system as having a predetermined set of meanings.

Origin

1920s; earliest use found in Classical Weekly.