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Ready or available when and if needed. We have a team of engineers on call if you experience any issues. I'm on call with the hospital, so I can't drink tonight.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
ready to serve when called. I live a very hard life. I'm on call twenty hours a day. I'm sorry, but I can't go out tonight. I'm on call at the hospital.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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.
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
on ˈcall(of a doctor, etc.) available for duty if needed: Our qualified staff are on call 24 hours a day should you need any technical support.
Farlex Partner Idioms Dictionary © Farlex 2017
1. Available when summoned for service or use: physicians who were on call for 48 hours.
2. Subject to payment on demand.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.