/ Thesaurus / O Synonyms of off line Find synonyms for: Adjective1. off-line (vs. on-line)usage: not on a regular route of a transportation system; "an off-line ticket office"2. off-line (vs. on-line)usage: not connected to a computer network; "off-line resources"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: philanthropy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language