Word.ws English Dictionary

undrain

undrain verb: to restore that which has drained away.

Verb

undrain (third-person singular simple present undrains, present participle undraining, simple past and past participle undrained)

  1. To restore that which has drained away.
    • The probable differences between gross and net drain also require an explanation of why some manpower "undrains" by returning home after a period of working in the United States.1970, John R. Niland, The Asian engineering brain drain, page 7
    • On this score, monastics are will-positioned, in that one of the purposes of monastic work was to recreate the garden of paradise. The Cistercians, however, have not made a move to undrain the swamps.2000, The American Benedictine Review - Volume 51, Issue 3, page 290

Noun

undrain (plural undrains)

  1. A water collection system that drains water away from a location.
    • The experiments with fresh and septic sludge show that for filters of the same size material, fresh sludge passes through into the undrains while septic sludge merely gives up its water.1911, Engineering and Contracting - Volume 36, page 307
    • New undrains, gravel retaining screens and air wash systems were installed.1952, Pennsylvania water works operators' association, Journal - Volumes 24-34, page 25

Examples of undrain in a sentence

  • Remove the repair reason, clear the problem from the database, and undrain the switch.2018, Betsy Beyer, Niall Richard Murphy, David K. Rensin, The Site Reliability Workbook: Practical Ways to Implement SRE, →ISBN:
  • Absence of filtered undrains beneath spillways or behind walls.1993, Loren Runar Anderson, Geotechnical practice in dam rehabilitation:

Forms of undrain

Verb
third-person singular presentundrains
present participleundraining
past participleundrained
pastundrained
Noun
pluralundrains

Origin of undrain

From un- + drain.

Questions about undrain

What does undrain mean?
Undrain means to restore that which has drained away.
How do you use undrain in a sentence?
Remove the repair reason, clear the problem from the database, and undrain the switch.
What part of speech is undrain?
Undrain can be a verb or a noun.
What is the past tense of undrain?
The past tense of undrain is undrained.

Words near undrain in the dictionary

  1. undraggled
  2. undragoned
  3. undragonish
  4. undragonlike
  5. undragooned
  6. undrain
  7. undrainable
  8. undrained
  9. undraining
  10. undrains
  11. undramatic

Source and license

Adapted from Wiktionary: undrain (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “undrain.” Word.ws, https://word.ws/undrain. Based on Wiktionary, CC BY-SA 4.0.