plague pit
historical
noun
A deep pit for the common burial of plague victims.
Origin
Mid 19th century; earliest use found in William Ainsworth (1805–1882), novelist.
- on bended knee(s)
- on board
- onboard
- onboarding
- on book
- ONC
- on call
- on-carry
- once
- once again (or more)
- once and for all (or once for all)
- once and future
- once a ——, always a ——
- once bitten, twice shy
- once-born
- once-fired
- once-for-all
- once in a blue moon
- once in a lifetime
- onceness
- once-off
- once-only
- once (or every once) in a while
- once or twice
- once-over