fly [ˈflaɪ]

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¹ fly verb

• to move through the air with wings
• to move through the air especially at a high speed —often used figuratively
• to control an airplane, helicopter, etc., as it moves through the air : to be the pilot of an aircraft

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² fly verb

• to hit a fly ball

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³ fly noun

• a small insect that has two wings
• a hook that is designed to look like an insect and that is used for catching fish

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⁴ fly noun

• an opening in a piece of clothing (such as a pair of trousers, shorts, or a skirt) that is hidden by a fold of cloth and that is closed by a zipper or a row of buttons —sometimes plural in British English
• fly ball