Definition: Any of various insects in the family Formicidae in the order Hymenoptera, typically living in large colonies composed almost entirely of flightless females. (definition from wiktionary.org)

Definition: 1. A large mass or body of snow and ice sliding swiftly down a mountain side, or falling down a precipice.

Definition: 1. An iron instrument for holding a ship or other vessel at rest in water. It has a strong shank, with a ring at one end, to which a cable may be fastened; at the other end, it has two arms and flukes, which form a suitable angle for the shank to enter the ground.

Definition - A vehicle which flies through air, powered by an engine with fixed wings.

Definition: Acorn – The seed or fruit of the oak; an oval nut which grows in a rough permanent cup.