| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024vac•u•um /ˈvækyum, -yəm/USA pronunciation n., pl. -u•ums for 1, 2. 4, 5. -u•a /-yuə/USA pronunciation for 1, 2. 4.;
adj.;
v. n. [countable] - Physicsa space entirely empty of matter.
- Physicsan enclosed space from which matter, esp. air, has been partially removed so that the matter or gas remaining in the space exerts less pressure than the atmosphere.
- a space not filled or occupied;
emptiness;
void:The loss of his son left a vacuum in his life. - vacuum cleaner.
adj. - Physicsof or relating to a vacuum.
v. - to clean with a vacuum cleaner: [~ + object]to vacuum the rug.[no object]I vacuum on Fridays.
See -vac-. WordReference Random House Unabridged Dictionary of American English © 2024vac•u•um (vak′yo̅o̅m, -yo̅o̅ əm, -yəm),USA pronunciation n., pl. vac•u•ums for 1, 2, 4–6, vac•u•a (vak′yo̅o̅ ə)USA pronunciation for 1, 2, 4, 6;
adj.;
v.n. - Physicsa space entirely devoid of matter.
- Physicsan enclosed space from which matter, esp. air, has been partially removed so that the matter or gas remaining in the space exerts less pressure than the atmosphere (opposed to plenum).
- Physicsthe state or degree of exhaustion in such an enclosed space.
- a space not filled or occupied;
emptiness;
void:The loss left a vacuum in his heart. - a vacuum cleaner or sweeper.
- Physicsa state of lowest energy in a quantum field theory.
adj. - of, pertaining to, employing, or producing a vacuum.
- (of a hollow container) partly exhausted of gas or air.
- pertaining to a device or process that makes use of a vacuum to accomplish a desired task.
- noting or pertaining to canning or packaging in which air is removed from the container to prevent deterioration of the contents.
v.t. - to use a vacuum cleaner on;
clean with a vacuum cleaner:to vacuum rugs. - to treat with any vacuum device, as a vacuum drier.
v.i. - to use a vacuum cleaner:to vacuum in the dining room.
- Latin, neuter of vacuus empty
- 1540–50
Collins Concise English Dictionary © HarperCollins Publishers:: vacuum /ˈvækjʊəm/ n ( pl vacuums, vacua /ˈvækjʊə/)- a region containing no matter; free space
- a region in which gas is present at a low pressure
- the degree of exhaustion of gas within an enclosed space: a high vacuum, a perfect vacuum
- a sense or feeling of emptiness: his death left a vacuum in her life
- short for vacuum cleaner
- (modifier) of, containing, measuring, producing, or operated by a low gas pressure: a vacuum tube, a vacuum brake
vb - to clean (something) with a vacuum cleaner: to vacuum a carpet
Etymology: 16th Century: from Latin: an empty space, from vacuus empty |