Verily, that which you are promised (that is, life after death) is true, and deep (the reckoning and the judgement and retribution) must indeed come to pass.

(adh-Dhaariyaat 51:5-6)

Have you noticed the person who denies Deen (the life after death)? He is one who spurns the orphan, and does not urge people to feed the needy and the indigent.

(al-Maa’oon 107:1-3)

And what do you know of the Day of Deen? Yea, what (little) do you know of the Day of deen. That is the Day when no human being shall be able to be of any service to another, the Day on which all authority and dispensation will tangibly be in the hands of Allah. (al-Infitaar 82:17-19)

Obviously, in these verses, the word has been used to imply both the final reckoning when men shall have been raised from the dead as well as the reward or punishment which will follow.