Watchtower dream meaning is explained below using 2 different sources. Each interpretation is shown with its source.

Interpretation 1 — Ibn Seerin

(Cupola, Minaret, Observatory) In a dream, a watchtower represents a notable person. Seeing a watchtower from a distance in a dream means victory over one’s adversary, attainment of one’s goals, rising in rank, or it could mean happiness.

If a merchant sees a watchtower in a dream, it means prosperity, presiding over his fellow merchants and gaining power. Building a watchtower in a dream has the same interpretation as building an edifice or a house.

Source: Islamic Dream Interpretation Author: Ibn Seerin

Interpretation 2 — Joan Seaman - Tom Philbin

Religious fervor.
Source: New American Dream Dictionary Author: Joan Seaman - Tom Philbin