• word of the day

    tumbler

    tumbler - Dictionary definition and meaning for word tumbler

    Definition
    (noun) a gymnast who performs rolls and somersaults and twists etc. Definition
    (noun) a glass with a flat bottom but no handle or stem; originally had a round bottom Definition
    (noun) a movable obstruction in a lock that must be adjusted to a given position (as by a key) before the bolt can be thrown Definition
    (noun) pigeon that executes backward somersaults in flight or on the ground
    Synonyms : roller , tumbler pigeon

Word used in video below:
text: backdoor has a five-pin tumbler system
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