This is the verse translation, not a definition of the individual word.
Indeed, in the creation of the heavens and earth; the alternation of the night and day; the sailing of the ships in the sea for the benefit of people; the sending down of rain from the sky by Allah, reviving thereby the earth after its death; the spreading of all kinds of creatures therein; the directing of the winds and clouds between the sky and earth – in all these, there are signs[1] for people of understanding.
Source
[1] There are two āyāt (signs) leading to belief: Quranic verses and cosmic signs. The signs meant in this verse are cosmic.