open-and-shut

[ oh-puh n-uh n-shuht ]
/ ˈoʊ pən ənˈʃʌt /

adjective

immediately obvious upon consideration; easily decided: an open-and-shut case of murder.

Origin of open-and-shut

An Americanism dating back to 1835–45

British Dictionary definitions for open and shut

open-and-shut

adjective

easily decided or solved; obvious an open-and-shut case

Idioms and Phrases with open and shut

open and shut

Simple, straightforward, easily solved, as in With three eyewitnesses, the prosecutor said this case was open and shut. This term suggests that one has immediate access to the facts of a situation. [c. 1840]