Abu Ali al-Qali said: “Using this word, the Arabs put a different meaning into it. So, if they say: "Nakaha fulan bandage fulan", then they mean that someone married such and such. And if they say: "Nakaha imraatahu au zujatah", they mean only "copulation", "sexual intercourse" that took place between a man and a woman. "
The word "an-nikah" in Shariah means "the conclusion of an agreement (in Arabic:" ’akd") between a man and a woman to enjoy each other, create a good family and form a healthy union. "

MARRIAGE AND DIVORCE IN ISLAM
Sheikh Muhammad ibn Salih al-сUsaymin