roof-spotting
noun
Observation from the top of a building to give warning of hostile aircraft.
Origin
1940s; earliest use found in The Times.
- unimportant
- unimposing
- unimposingly
- unimpressed
- unimpressionable
- unimpressive
- unimpressively
- unimpressiveness
- unimproved
- unincorporated
- uninfected
- uninflamed
- uninflected
- uninfluenced
- uninfluential
- uninformative
- uninformed
- uninhabitable
- uninhabited
- uninhibited
- uninhibitedly
- uninhibitedness
- uninitiated
- uninjured
- uninspired