Meaning of “plumb” in the English Dictionary

"plumb" in British English

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plumbverb [ T ]

uk /plʌm/ us /plʌm/


uk /plʌm/ us /plʌm/

plumbadjective [ after verb ]

uk /plʌm/ us /plʌm/ specialized

exactly straight, usually describing a vertical surface or line:

When you hang a door, you need to make sure that it is both level and plumb.
out of plumb

not straight vertically:

The external wall is out of plumb by half a metre.

(Definition of “plumb” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

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