keep a tight rein on(redirected from keep on a tight rein)
keep a tight rein on someone or somethingand keep a close rein on someone or something
Fig. to watch and control someone or something diligently. (Alludes to controlling a horse by a tight grip on the reins.) The office manager kept a tight rein on the staff. Mary keeps a close rein on her children.
keep a tight rein on somebody/something
to control someone or something carefully Clarke has consistently pointed to the need to keep a tight rein on government finances. He kept a tight rein on his daughter.
keep a tight rein on somebody/somethingalso keep somebody/something on a tight rein
to have a lot of control over someone or something He made ends meet by keeping a tight rein on his budget. Our parents always kept us on a pretty tight rein.