Definition of BACK

to promote the interests or cause of <she enthusiastically backed the plan to renovate and upgrade the school's facilities>
Synonyms advocate, back, champion, endorse (also indorse), patronize, plump (for), plunk (for) or plonk (for)
to provide (someone) with what is useful or necessary to achieve an end <a number of influential people have already agreed to back the candidate>
Synonyms abet, aid, assist, back, backstop, prop (up), support
Antonyms hinder
to provide evidence or information for (as a claim or idea) <the author needs to back her thesis with more facts>
Synonyms back, bolster, buttress, corroborate, reinforce (also reenforce), shore (up), substantiate
Near Antonyms undercut, undermine, weaken

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