Longman Dictionary of Contemporary English homepage

Date: 1300-1400
Language: Old French
Origin: requerre, from Vulgar Latin requaerere 'to try to find, need', from Latin requirere, from quaerere 'to ask'

require

 verb
     
re‧quire S1 W1 [transitive not in progressive]
1 to need something:
Campbell's broken leg will probably require surgery.
What's required is a complete reorganization of the system.
Most house plants require regular watering.
2 if you are required to do or have something, a law or rule says you must do it or have it
be required to do something
You are required by law to wear a seat belt.
require that
Regulations require that students attend at least 90% of the lectures.
The bill failed to get the required number of votes.
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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