what is the main function of the barrel

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 main differences and similarities between them? The meaning of MAIN is physical strength : force —used in the phrase with might and main. How to use main in a sentence. MAIN definition: chief in size, extent, or importance; principal; leading. See examples of main used in a sentence. MAIN definition: 1. larger, more important, or having more influence than others of the same type: 2. a large pipe…. Learn more. main (meɪn) adj (prenominal) 1. chief or principal in rank, importance, size, etc 2. sheer or utmost (esp in the phrase by main force)

main (third-person singular simple present mains, present participle maining, simple past and past participle mained) (transitive, slang) Ellipsis of mainline (“to inject (a drug) directly into a vein ”). main, n.¹ meanings, etymology, pronunciation and more in the Oxford English Dictionary