Longman Dictionary of Contemporary English homepage

conventional

 adjective
     
Related topics: Weapons
con‧ven‧tion‧al W3
1 [only before noun] a conventional method, product, practice etc has been used for a long time and is considered the usual type:
Internet connections through conventional phone lines are fairly slow.
Bake for 20 minutes in a conventional oven; 8 in a microwave.
2 always following the behaviour and attitudes that most people in a society consider to be normal, right, and socially acceptable, so that you seem slightly boring:
a strong believer in conventional morals
conventional in
He is conventional in his approach to life.
3

(the) conventional wisdom

the opinion that most people consider to be normal and right, but that is sometimes shown to be wrong:
As traffic grew, the conventional wisdom was to widen the roads.
4 [only before noun]PMW conventional weapons and wars do not use nuclear explosives or weapons:
conventional forces
5

conventional medicine

MH the usual form of medicine practised in most European and North American countries [= western medicine]
—conventionally adverb
—conventionality noun [uncountable]
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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