| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024o'clock /əˈklɑk/USA pronunciation adv. - Time(used after a number, from 1 to 12, to specify the hour of the day):11 o'clock in the morning.
- Surveying(used after a number to indicate a position in space in front of one's view, as if one could see a clock and the numbers of the clock's face with 12 o'clock directly ahead in horizontal position or straight up in vertical position):The pilot called out, "Enemy planes approaching at ten o'clock.''
WordReference Random House Unabridged Dictionary of American English © 2024o'clock (ə klok′),USA pronunciation adv. - Timeof, by, or according to the clock (used in specifying the hour of the day):It is now 4 o'clock.
- Surveyingaccording to a method for indicating relative position whereby a plane in space is considered to be numbered as a clock's face, with 12 o'clock considered as directly ahead in horizontal position or straight up in vertical position.
Collins Concise English Dictionary © HarperCollins Publishers:: o'clock /əˈklɒk/ adv - used after a number from one to twelve to indicate the hour of the day or night
- used after a number to indicate direction or position relative to the observer, twelve o'clock being directly ahead or overhead and other positions being obtained by comparisons with a clock face
Etymology: 18th Century: abbreviation for of the clock |