5. Important; necessary. [Obs.]

That which thou aright Believest so main to our success, I bring.

Milton.

By main force, by mere force or sheer force; by violent effort; as, to

subdue insurrection by main force.

That Maine which by main force Warwick did win.

Shak.

-- By main strength, by sheer strength; as, to lift a heavy weight by

main strength. -- Main beam (Steam Engine), working beam. -- Main boom

(Naut.), the boom which extends the foot of the mainsail in a fore and

aft vessel. -- Main brace. (a) (Mech.) The brace which resists the

chief strain. Cf. Counter brace. (b) (Naut.) The brace attached to the

main yard. -- Main center (Steam Engine), a shaft upon which a working

beam or side lever swings. -- Main chance. See under Chance. -- Main

couple (Arch.), the principal truss in a roof. -- Main deck (Naut.),

the deck next below the spar deck; the principal deck. -- Main keel

(Naut.), the principal or true keel of a vessel, as distinguished from

the false keel.

Syn. -- Principal; chief; leading; cardinal; capital.

Main, adv. [See Main, a.] Very; extremely; as, main heavy. "I'm main

dry." Foote. [Obs. or Low]

Maine (?), n. One of the New England States.

Maine law, any law prohibiting the manufacture and sale of intoxicating

beverages, esp. one resembling that enacted in the State of Maine.

Main`-gauche" (mN`gsh"), n. [F., the left hand.] (Ancient Armor) The

dagger held in the left hand, while the rapier is held in the right; --

used to parry thrusts of the adversary's rapier.

Main"-ham`per (?), n. [F. main hand (see Main a hand at dice) + E.

hamper.] A hamper to be carried in the hand; a hand basket used in

carrying grapes to the press.

Main"land` (?), n. The continent; the principal land; -- opposed to

island, or peninsula. Dryden.

After the two wayfarers had crossed from the peninsula to the

mainland.

Hawthorne.

Main"ly (?), adv. [From main strong. See Main strength.] Very strongly;

mightily; to a great degree. [Obs.] Bacon. Shak.

Main"ly, adv. [From main principal, chief.] Principally; chiefly.

Main"mast` (?), n. (Naut.) The principal mast in a ship or other

vessel.

Main"or (?), n. [Anglo-Norm. meinoure, OF. manuevre. See Maneuver.] (O.

Eng. Law) A thing stolen found on the person of the thief.

A thief was said to be "taken with the mainor," when he was taken with

the thing stolen upon him, that is, in his hands. Wharton. Bouvier.

Main"per*na*ble (?), a. [OF. main hand + pernable, for prenable, that

may be taken, pregnable. See Mainpernor.] (Law) Capable of being

admitted to give surety by mainpernors; able to be mainprised.

Main"per*nor (?), n. [OF. main hand + pernor, for preneor, a taker, F.

preneur, fr. prendre to take.] (Law) A surety, under the old writ of

mainprise, for a prisoner's appearance in court at a day.

Mainpernors differ from bail in that a man's bail may imprison or

surrender him before the stipulated day of appearance; mainpernors can

do neither; they are bound to produce him to answer all charges

whatsoever. Blackstone.

Main"pin (?), n. (Vehicles) A kingbolt.

Main"prise (?), n. [F. main hand + prise a taking, fr. prendre, p. p.

pris to take, fr. L. prehendere, prehensum.] (Law) (a) A writ directed

to the sheriff, commanding him to take sureties, called mainpernors,

for the prisoner's appearance, and to let him go at large. This writ is

now obsolete. Wharton. (b) Deliverance of a prisoner on security for

his appearance at a day.

Main"prise, v. t. [imp. & p. p. Mainprised (?); p. pr. & vb. n.

Mainprising.] (Law) To suffer to go at large, on his finding sureties,

or mainpernors, for his appearance at a day; -- said of a prisoner.

Mains (mnz), n. [Scot. See Manse.] The farm attached to a mansion

house. [Scot.]

Main"sail` (mn"sl`), n. (Naut.) The principal sail in a ship or other

vessel.

[They] hoised up the mainsail to the wind.

Acts xxvii. 40.

The mainsail of a ship is extended upon a yard attached to the

mainmast, and that of a sloop or schooner upon the boom.

Main"sheet` (?), n. (Naut.) One of the ropes by which the mainsail is

hauled aft and trimmed.

Main"spring` (?), n. The principal or most important spring in a piece

of mechanism, especially the moving spring of a watch or clock or the

spring in a gunlock which impels the hammer. Hence: The chief or most

powerful motive; the efficient cause of action.

Main"stay` (?), n. 1. (Naut.) The stay extending from the foot of the

foremast to the maintop.

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