noun

*pl.*-·tries

- the branch of mathematics that deals with points, lines, planes, and figures, and examines their properties, measurement, and mutual relations in space
- a book about geometry
- a specific system of geometry

Origin of geometry

Middle English*geometrie*from Old French from Classical Latin

*geometria*from Classical Greek

*ge?metria*from

*ge?metrein*, to measure the earth from

*g?*, earth +

*metria*, measurement from

*metrein*, to measure: for Indo-European base, see meter