We found 6 dictionaries that define the word push against an open door:

General (2 matching dictionaries)

1. push against an open door: Wiktionary
2. push against an open door: TheFreeDictionary.com

Business (1 matching dictionary)

3. push against an open door: Legal dictionary

Computing (1 matching dictionary)

4. push against an open door: Encyclopedia

Medicine (1 matching dictionary)

5. push against an open door: Medical dictionary

Miscellaneous (1 matching dictionary)

6. push against an open door: Idioms

Definitions from Wiktionary (push against an open door) ▸ verb:  (idiomatic) To do something pointless or unnecessary; to try doing something already done. Similar: kick at an open door, push, push it, push on, push in, push forward, push past, force, press, push up against, more... Opposite: pull, enter, go through, pass through ▸ Words similar to push against an open door ▸ Usage examples for push against an open door ▸ Idioms related to push against an open door ▸ Wikipedia articles (New!) ▸ Words that often appear near push against an open door ▸ Rhymes of push against an open door ▸ Invented words related to push against an open door