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o'clock adverb

  /oʊˈklɑk/ , /əʊˈklɒk/ , /əˈklɑk/ , /əˈklɒk/
  • (modifying a numeral, one to twelve) In conjunction with a numeral, indicates the time within a twelve-hour period (midnight to noon or noon to midnight), specifically the time when the hour hand of a clock points precisely to the symbol or marking corresponding to the designated numeral.
ein Uhr
  • (with a numeral, one to twelve) In conjunction with a numeral, indicates the direction, relative to the speaker or a vehicle, especially an aircraft, corresponding to the direction the hour hand is pointing at the time corresponding to the numeral, with twelve representing directly ahead on a horizontal plane, or directly up on a vertical plane, and three being to the right on either.
ein Uhr, um 1 Uhr, um eins
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