n. & adj.
--n.
1. a straight line, curve, or surface that meets another curve or curved surface at a point, but if extended does not intersect it at that point.
2 the ratio of the sides opposite and adjacent to an angle in a right-angled triangle.
--adj.
1. (of a line or surface) that is a tangent.
2 touching.
Phrases and idioms:
at a tangent diverging from a previous course of action or thought etc. (go off at a tangent). tangent galvanometer a galvanometer with a coil through which the current to be measured is passed, its strength being proportional to the tangent of the angle of deflection.
Derivatives:
tangency n.
Etymology: L tangere tangent- touch