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English definition of “depth”

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depth

noun [C/U]  /depθ/ us  

depth noun [C/U] (DISTANCE DOWN)

the distance down from the top surface of something to the bottom: [C] They were scuba diving at a depth of 22 meters. [U] The numbers on the left show the depth in inches.

depth noun [C/U] (DISTANCE BACKWARD)

the distance from the front to the back of something: [U] Bookshelves should be at least nine inches in depth.

depth noun [C/U] (STRENGTH)

the strength, quality, or degree of being complete: [U] It’s hard to get a handle on the depth of her knowledge.

depth noun [C/U] (SERIOUSNESS)

the ability to think seriously about something: [U] Don’t look for depth in this show.in depth Something done in depth is done carefully and in great detail: I interviewed her in depth. an in-depth report
(Definition of depth from the Cambridge Academic Content Dictionary © Cambridge University Press)
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