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

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

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 …

The main thing is to keep calm and don’t get angry. The main social event of the summer was a dance and reception.

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.

Dec 21, 2025 · main (not comparable) Of chief or leading importance; prime, principal. [from 15th c.] quotations The main office is actually one of the smaller rooms.

MAIN definition: chief in size, extent, or importance; principal; leading. See examples of main used in a sentence.

My radio runs either off batteries or off the mains. We haven't had any mains water/electricity since the storm. Turn off the water at the mains.

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.