(countable) A wheel with grooves (teeth) engraved on the outer circumference, such that two such devices can interlock and convey motion from one to the other; a gear wheel.

意味（5）

(countable, automotive, cycling) A particular combination or choice of interlocking gears, such that a particular gear ratio is achieved.

意味（6）

意味（7）

(aviation) Ellipsis of landing gear.

gear-up landing

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意味（8）

(uncountable, slang) Recreational drugs, including steroids.

"Have you got any gear? Dominic, have you got any acid?" Emma kept running her hands nervously through her hair. "Not LSD, man; that last trip freaked me out."

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意味（9）

(uncountable, archaic) Stuff.

When he was digged up, which was in the presence of the Magistracy of the Town, his body was found entire, not at all putrid, no ill smell about him, saving the mustiness of the grave-Clothes, his joynts limber and flexible, as in those that are alive, his skin only flaccid, but a more fresh grown in the room of it, the wound of his throat gaping, but no gear nor corruption in it; there was also observed a Magical mark in the great toe of his right foot, viz. an Excrescency in the form of a Rose.

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