a method of surveying; the area is divided into triangles and the length of one side and its angles with the other two are measured, then the lengths of the other sides can be calculated
a trigonometric method of determining the position of a fixed point from the angles to it from two fixed points a known distance apart; useful in navigation
a grant (by a sovereign or a legislative body) of resources to maintain a dependent member of a ruling family; "bishoprics were received as appanages for the younger sons of great families"
any customary and rightful perquisite appropriate to your station in life; "for thousands of years the chair was an appanage of state and dignity rather than an article of ordinary use"