What does « Ḥarb » mean in the Quran?

And if you do not, then be informed of a war [against you] from Allah and His Messenger. But if you repent, you may have your principal - [thus] you do no wrong, nor are you wronged.

So her Lord accepted her with good acceptance and caused her to grow in a good manner and put her in the care of Zechariah. Every time Zechariah entered upon her in the prayer chamber, he found with her provision. He said, "O Mary, from where is this [coming] to you?" She said, "It is from Allah. Indeed, Allah provides for whom He wills without account."

So the angels called him while he was standing in prayer in the chamber, "Indeed, Allah gives you good tidings of John, confirming a word from Allah and [who will be] honorable, abstaining [from women], and a prophet from among the righteous."

Indeed, the penalty for those who wage war against Allah and His Messenger and strive upon earth [to cause] corruption is none but that they be killed or crucified or that their hands and feet be cut off from opposite sides or that they be exiled from the land. That is for them a disgrace in this world; and for them in the Hereafter is a great punishment,

And the Jews say, "The hand of Allah is chained." Chained are their hands, and cursed are they for what they say. Rather, both His hands are extended; He spends however He wills. And that which has been revealed to you from your Lord will surely increase many of them in transgression and disbelief. And We have cast among them animosity and hatred until the Day of Resurrection. Every time they kindled the fire of war [against you], Allah extinguished it. And they strive throughout the land [causing] corruption, and Allah does not like corrupters.