Word.ws English Dictionary

under glass

under glass prepositional phrase: in a greenhouse, a cold frame, or a similar structure; said of the propagation and growth of plants.

Prepositional phrase

  1. (literal) In a greenhouse, a cold frame, or a similar structure; said of the propagation and growth of plants.
  2. In a glass case, like an item in a museum.
  3. (idiomatic, slang) In jail.

Questions about under glass

What does under glass mean?
Under glass means in a greenhouse, a cold frame, or a similar structure; said of the propagation and growth of plants.
What part of speech is under glass?
Under glass is a prepositional phrase.

Words near under glass in the dictionary

  1. under cover
  2. under cover of darkness
  3. under cover of night
  4. under erasure
  5. under fire
  6. under glass
  7. under ground
  8. under hack
  9. under hatches
  10. under lock and key
  11. under no circumstance

Source and license

Adapted from Wiktionary: under glass (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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Pronunciation audio from Wikimedia Commons, each file under its own free license: En-au-under glass.ogg.

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