Available if summoned, as in Medical residents are required to be on call at least three nights a week. This expression originated as at call in the late 1500s. Also see at someone's beck and call.
Words nearby on call
How to use on call in a sentence
Just the hard-on before you shoot unarmed members of the public.'Babylon' Review: The Dumb Lives of Trigger-Happy Cops|Melissa Leon|January 9, 2015|DAILY BEAST
Three on-the-record stories from a family: a mother and her daughters who came from Phoenix.I Tried to Warn You About Sleazy Billionaire Jeffrey Epstein in 2003|Vicky Ward|January 7, 2015|DAILY BEAST
You just travel light with carry-on luggage, go to cities that you love, and get to hang out with all your friends.
It was a brick wall that we turned into the on-ramp of a highway.
Could the (thus far) timid trembling give way to a full-on, grand mal seizure?26 Earthquakes Later, Fracking’s Smoking Gun Is in Texas|James Joiner|January 7, 2015|DAILY BEAST
Everything is topsy-turvy in Europe according to our moral ideas, and they don't have what we call "men" over here.
It was like his beautiful courtesy to call me in and introduce me to Blow instead of letting me go away.
After an hour, however, he reached this decision: He would not go to or call up Mrs. Merley.The Homesteader|Oscar Micheaux
"I call you," the policeman said, and stripping the saddle and bridle from his sweaty horse, turned him loose to graze.Raw Gold|Bertrand W. Sinclair
Each did his duty, or was adjured to do it, in the "state of life to which it had pleased God to call him."The Unsolved Riddle of Social Justice|Stephen Leacock