push against an open door

English

Alternative forms

• push against open doors

Pronunciation

• Audio (AU)

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Verb

push against an open door (third-person singular simple present pushes against an open door, present participle pushing against an open door, simple past and past participle pushed against an open door)

1. (idiomatic) To do something pointless or unnecessary; to try doing something already done.

   Synonyms: preach to the choir, preach to the converted