Definition of reject verb from the Oxford Advanced Learner's Dictionary
reject
verb
rɪˈdʒekt rɪˈdʒekt
argument/idea/plan
1reject somethingto refuse to accept or consider somethingto reject an argument/a claim/a decision/an offer/a suggestionThe prime minister rejected any idea of reforming the system.The proposal was firmly rejected.All our suggestions were rejected out of hand.
somebody for job
2reject somebodyto refuse to accept somebody for a job, position, etcPlease reject the following candidates…I've been rejected by all the universities I applied to.
not use/publish
3reject somethingto decide not to use, sell, publish, etc. something because its quality is not good enoughImperfect articles are rejected by our quality control.
new organ
4reject something (of the body) to not accept a new organ after a transplant operation, by producing substances that attack the organHer body has already rejected two kidneys.
not love
5reject somebody/somethingto fail to give a person or an animal enough care or affectionThe lioness rejected the smallest cub, which died.When her husband left home she felt rejected and useless.
rejection
rɪˈdʒekʃn rɪˈdʒekʃn
noun[uncountable, countable]Her proposal met with unanimous rejection.a rejection letter (= a letter in which you are told, for example, that you have not been accepted for a job)painful feelings of rejection
rɪˈdʒekt 
rɪˈdʒekt 
1 reject something to refuse to accept or consider somethingto reject an argument/a claim/a decision/an offer/a suggestionThe prime minister rejected any idea of reforming the system.The proposal was firmly rejected.All our suggestions were rejected out of hand.