This is the verse translation, not a definition of the individual word.
And to the people of Thamūd [We sent] their brother, Sālih. He said, “O my people, worship Allah; you have no god other than Him. There has come to you a clear proof from your Lord: this is a she-camel[1] of Allah, as a sign to you. So leave her to graze in Allah’s land, and do not harm her in any way, or else a painful punishment will seize you.