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1. Having returned to one's home. We should be back home by 9 PM. I wonder if Tom and the kids are already back home.
2. In one's hometown. The food here is pretty good, but the barbecue back home beats it by a mile!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
*back (some place)
returned to some place; at some place again. (*Typically: be ~; get ~; arrive ~.) I can't wait till we get back home. When will we get back? Is it much farther?
(at someone) repaying someone for a bad deed. (*Typically: get ~; have ~.) Tom called me a jerk, but I'll get back at him. I don't know how I'll get back for her insult, but I will.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
n. one’s support or second in a fight. (From back-up.) I need a back I can depend on.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.