(chiefly, US, idiomatic) During the period of time when one is in a position of authority or responsibility.
[Robert] Gates emerged from the first week of hearings bearing only a few scratches. He even vowed to resign if illegal activity occurred on his watch.
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Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
See all Regional & Other slang on Slangora.