Meaning of “push” - Learner’s Dictionary

push

noun uk us /pʊʃ/
a push for sth/to do sth

a big effort to achieve something or make someone do something:

a push for higher standards in education
MOVEMENT [ C ]

B1 the act of moving someone or something by pressing them with your hands or body:

[ usually singular ] She gave him a little push towards the door.
give sb the push UK informal

to get rid of someone from a job or relationship

ENCOURAGEMENT [ C ]

encouragement to make someone do something:

[ usually singular ] I'm sure he'll go, he just needs a little push that's all.
at a push UK

If you can do something at a push, you can do it but it will be difficult.

(Definition of “push noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)