The meaning of MAIN is physical strength : force —used in the phrase with might and main. How to use main in a sentence.

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When you describe something as main, you mean it's the most important, well-known, or biggest of its kind. The main branch of the post office in a city is usually the largest and busiest.

The main thing is the most important one of several similar things in a particular situation. ...one of the main tourist areas of Amsterdam. My main concern now is to protect the children. What are the …

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main (meɪn) adj (prenominal) 1. chief or principal in rank, importance, size, etc 2. sheer or utmost (esp in the phrase by main force)

physical strength, power, or force: to struggle with might and main. the chief or principal part or point: The main of their investments was lost during the war.

Main definition: Most important; principal.

MAIN definition: 1. most important or largest: 2. the most important fact in a situation: 3. a pipe that carries…. Learn more.

Mar 23, 2026 · main (not comparable) Of chief or leading importance; prime, principal. [from 15th c.] quotations