pushback

1. The act of repelling an enemy, etc. (countable, uncountable)
2. A procedure in which an aircraft is pushed backwards away from the gate by some external force, usually a special tractor. (countable, uncountable)
3. A reversal or reduction. (countable, figuratively, uncountable)
4. Criticism of or resistance to a proposal, stance, or event. (countable, figuratively, uncountable)
5. Summary expulsion of asylum seekers, especially when violating the principle of non-refoulement. (countable, uncountable)
6. Squashing the main video channel into part of the screen to allow another video feed to be played simultaneously; especially, to squeeze the credits of a show in order to play adverts. (US, countable, uncountable)

Plural pushbacks