noun
a small, usually metal compartment that can be locked, especially one at a gym or school for storing personal items
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The student stored their books in their locker before heading to class.
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I left my jacket in my locker, can you grab it for me?
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I always keep my snacks in my locker for when I get hungry during the day.
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She kept her emotions locked away in a mental locker, never letting anyone see how she truly felt.