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sub 1

1. Nautical A submarine.
2. A submarine sandwich.

sub 2

 (sŭb) Informal
A substitute.
v. subbed, sub·bing, subs
To act as a substitute: a graduate student subbing for the professor.
1. To put or use (a person or thing) as a substitute: The coach subbed fresh players toward the end of the game. The cook subbed oil for butter.
2. Usage Problem To replace; substitute: The player was subbed after she committed two errors. Sub the chicken with tofu to make the dish vegetarian. See Usage Note at substitute.
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.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.subbing - working as a substitute for someone who is ill or on leave of absence
work - activity directed toward making or doing something; "she checked several points needing further work"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
When Nelson began subbing in Aldine after spending a few years as a para-professional there, the only training available was "a video that sort of showed what was expected of you as a sub," she says.
The words of Colinthia Gosa are those that every administrator should lung to hear: I have never, the whole time I've been here in Fulton County, felt like I was just a sub.'" A retired Delaware educator who has been subbing in the Georgia district for more than two years, Gosa says teachers and administrators have always been there to help her in any way.