A head of real or synthetic hair worn on the head to disguise baldness, for cultural or religious reasons, for fashion, or by actors to help them better resemble the character they are portraying.

(idiomatic) Alternative spelling of dyed-in-the-wool (Set in one's ways, steadfast.)

An arithmetic mean of values biased according to agreed weightings.

(chiefly medicine) The abnormal liking or tendency for the use of acronyms.