Bible Encyclopedias
Plain

1911 Encyclopedia Britannica

(0. Fr. plain, from Lat. planum), a level surface; hence in physical geography a tract of country generally quite flat or comparatively so (see Geography). The adjective "plain" signifies "level," and thence smooth, clear, simple, ordinary, &c.

Bibliography Information
Chisholm, Hugh, General Editor. Entry for 'Plain'. 1911 Encyclopedia Britanica. https://www.studylight.org/​encyclopedias/​eng/​bri/​p/plain.html. 1910.