What does « Gehenna / Hell » mean in the Quran?

But whoever kills a believer intentionally - his recompense is Hell, wherein he will abide eternally, and Allah has become angry with him and has cursed him and has prepared for him a great punishment.

Indeed, those whom the angels take [in death] while wronging themselves - [the angels] will say, "In what [condition] were you?" They will say, "We were oppressed in the land." The angels will say, "Was not the earth of Allah spacious [enough] for you to emigrate therein?" For those, their refuge is Hell - and evil it is as a destination.

And whoever opposes the Messenger after guidance has become clear to him and follows other than the way of the believers - We will give him what he has taken and drive him into Hell, and evil it is as a destination.

The refuge of those will be Hell, and they will not find from it an escape.

And it has already come down to you in the Book that when you hear the verses of Allah [recited], they are denied [by them] and ridiculed; so do not sit with them until they enter into another conversation. Indeed, you would then be like them. Indeed Allah will gather the hypocrites and disbelievers in Hell all together -

Except the path of Hell; they will abide therein forever. And that, for Allah, is [always] easy.

[Allah] said, "Get out of Paradise, reproached and expelled. Whoever follows you among them - I will surely fill Hell with you, all together."

They will have from Hell a bed and over them coverings [of fire]. And thus do We recompense the wrongdoers.

And We have certainly created for Hell many of the jinn and mankind. They have hearts with which they do not understand, they have eyes with which they do not see, and they have ears with which they do not hear. Those are like livestock; rather, they are more astray. It is they who are the heedless.

And whoever turns his back to them on such a day, unless swerving [as a strategy] for war or joining [another] company, has certainly returned with anger [upon him] from Allah, and his refuge is Hell - and wretched is the destination.

Indeed, those who disbelieve spend their wealth to avert [people] from the way of Allah. So they will spend it; then it will be for them a [source of] regret; then they will be overcome. And those who have disbelieved - unto Hell they will be gathered.

[This is] so that Allah may distinguish the wicked from the good and place the wicked some of them upon others and heap them all together and put them into Hell. It is those who are the losers.

The Day when it will be heated in the fire of Hell and seared therewith will be their foreheads, their flanks, and their backs, [it will be said], "This is what you hoarded for yourselves, so taste what you used to hoard."

And among them is he who says, "Permit me [to remain at home] and do not put me to trial." Unquestionably, into trial they have fallen. And indeed, Hell will encompass the disbelievers.

Do they not know that whoever opposes Allah and His Messenger - that for him is the fire of Hell, wherein he will abide eternally? That is the great disgrace.

Allah has promised the hypocrite men and hypocrite women and the disbelievers the fire of Hell, wherein they will abide eternally. It is sufficient for them. And Allah has cursed them, and for them is an enduring punishment.

O Prophet, fight against the disbelievers and the hypocrites and be harsh upon them. And their refuge is Hell, and wretched is the destination.

Those who remained behind rejoiced in their staying [at home] after [the departure of] the Messenger of Allah and disliked to strive with their wealth and their lives in the cause of Allah and said, "Do not go forth in the heat." Say, "The fire of Hell is more intensive in heat" - if they would but understand.

They will swear by Allah to you when you return to them that you would leave them alone. So leave them alone; indeed they are evil; and their refuge is Hell as recompense for what they had been earning.

Then is one who laid the foundation of his building on righteousness [with fear] from Allah and [seeking] His approval better or one who laid the foundation of his building on the edge of a bank about to collapse, so it collapsed with him into the fire of Hell? And Allah does not guide the wrongdoing people.

Except whom your Lord has given mercy, and for that He created them. But the word of your Lord is to be fulfilled that, "I will surely fill Hell with jinn and men all together."

For those who have responded to their Lord is the best [reward], but those who did not respond to Him - if they had all that is in the earth entirely and the like of it with it, they would [attempt to] ransom themselves thereby. Those will have the worst account, and their refuge is Hell, and wretched is the resting place.

Before him is Hell, and he will be given a drink of purulent water.

[It is] Hell, which they will [enter to] burn, and wretched is the settlement.

And indeed, Hell is the promised place for them all.