A person who supplies strong and reliable support, especially in difficult times.

(Zoroastrianism) A low, cylindrical, open-topped tower where Zoroastrians place the bodies of deceased people to disintegrate from exposure and consumption by carrion birds such as vultures, the remaining bones being kept in an ossuary; a dakhma.

(architecture) A tower, usually in a prominent position, having a large clock in a high position, often with several faces.

(physics, engineering) A tower, containing a long evacuated tube, within which objects can be dropped experimentally. / An amusement ride in which riders experience free fall.

(fortifications) A bastion of masonry, often with chambers beneath it, built at an angle of the interior polygon of some works.

Turritis glabra (syn. Arabis glabra), a tall, slim, grey-green plant with small creamy flowers at the top of the stem.

A large tower or chamber used in the manufacture of sulfuric acid, to condense the crude acid and to deliver concentrated acid charged with nitrous fumes. These fumes, as a catalyst, effect the conversion of sulfurous to sulfuric acid.

(video games) A style of real-time strategy video game in which the player attempts to stop enemies from crossing a map by building traps to slow them down and towers or turrets which shoot at them as they pass within range.

(historical) A high tower fitted with arclights, formerly common in 19th-century cities with electricity, as a means of illuminating public spaces.

A tower built into and forming part of a line of fortification or a fortified city wall.