rein

(redirected from keeping a tight rein on)
Also found in: Dictionary, Thesaurus, Medical, Idioms, Encyclopedia.
References in periodicals archive ?
Biological and chemical sensors may one day find vital niches in nearly every aspect of our lives--from sniffing out methane gas leaks in homes and ensuring food freshness in the grocery store to keeping a tight rein on the delivery of therapeutic drugs and providing expeditious blood analyses in emergency rooms.