glass onion
Proposed by a contributor, not yet supported by evidence.
Meaning · English
monocle.
Register: informal, slang
Where it’s used:
Used
American English
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “glass onion” mean?
monocle.
Is “glass onion” formal or informal?
glass onion is generally informal, slang.