The configuration in a projective plane (see projective space) consisting of four points in general position, together with the six lines joining them pairwise, as in the figure.
A complete quadrangle
Its dual is a complete quadrilateral consisting of four lines, no three being concurrent, together with the six points in which they pairwise intersect.
- overshoot
- overshoot boundary
- overshooting
- overspecialization
- overspill
- overstep
- over-stimulation
- over-subscription
- over-the-counter market
- over the wire
- overthrust
- overtime
- overtime ban
- overtone
- overtone mode
- overtones
- overtrading
- overturned fold
- over-urbanization
- over-valued currency
- over-voltage
- overvoltage
- overvoltage release
- overwrite
- overwriting virus