single [ˈsɪŋgəl]

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¹ single adjective

• not having or including another : only one —sometimes used to emphasize the largeness or importance of something —sometimes used in negative statements to emphasize that there is a complete lack of something
• not married or not having a serious romantic relationship with someone
• —used for emphasis after words like any, each, every, etc.

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² single noun

• an unmarried person and especially one who is young and socially active—usually plural —often used before another noun
• a hit that allows the batter to reach first base
• a hit that scores one run

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³ single verb

• to hit a single in baseball