Meaning of main

Definition of main

(adj) most important element; "the chief aim of living"; "the main doors were of solid glass"; "the principal rivers of America"; "the principal example"; "policemen were primary targets"; "the master bedroom"; "a master switch"
(of a clause) capable of standing syntactically alone as a complete sentence; "the main (or independent) clause in a complex sentence has at least a subject and a verb"
of force; of the greatest possible intensity; "by main strength"
(noun) any very large body of (salt) water
a principal pipe in a system that distributes water or gas or electricity or that collects sewage

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