Longman Dictionary of Contemporary English homepage

Date: 1600-1700
Language: Latin
Origin: praecludere 'to block up', from claudere 'to close'

preclude

verb
     
pre‧clude [transitive]
formal to prevent something or make something impossible:
rules that preclude experimentation in teaching methods
preclude somebody from doing something
Age alone will not preclude him from standing as a candidate.

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