- plan (n.)
- 1678, "drawing, sketch, or diagram of any object," from Fr. plan "ground plan, map," lit. "plane surface" (1553), from L. planum "level or flat surface," n. use of adj. planus "level, flat" (see plane (1)). The notion is of "a drawing on a flat surface." Meaning "scheme of action, design" is first recorded 1706, possibly infl. by Fr. planter "to plant," from It. planta "ground plan." The verb is first recorded 1728. Planned economy is attested from 1931. Planned Parenthood (1942) formerly was Birth Control Federation of America. Phrase planned obsolescence is attested from 1966. Planner "book or device that enables one to plan" is attested from 1971.