n. 1. To make a (steel) ship's hull nonmagnetic by applying an opposing magnetic field. [ WordNet 1.5 ]
2. To remove irregular magnetization in (the electron gun of a cathode-ray tube); -- used to improve picture quality, especially in computer monitors. [ PJC ]
(v) make nonmagnetic; take away the magnetic properties (of), Syn. degauss, demagnetise, Ant. magnetise, magnetize, Example:demagnetize the iron shavings; they degaussed the ship