noun
spare umbrella kept at work or school
An umbrella left at a workplace or school in case of unexpected rain, so one doesn't have to carry it daily.
会社に置き傘をしているので、急な雨でも安心です。
I keep a spare umbrella at the office, so I'm not worried about sudden rain.
学校のロッカーに置き傘を入れている生徒が多い。
Many students keep a spare umbrella in their school lockers.