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on

see definition of on
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Synonyms for on

adv in contact; ahead of

Antonyms for on

  • off
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

ahead

adverb. in front or advance of
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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