x_{1} is a plane [2-dimensional shape/form] defined by points x_{2} (set); x_{1} is flat/[smooth].

Also: x_{1} is even/planar/level.
(x_{2} is a set of points at least sufficient to define the plane); See also xutla, sefta, tapla, karda, boxfo, pinta.

- boxfo
- x
_{1}is a sheet/foil/blanket [2-dimensional shape/form flexible in 3 dimensions] of material x_{2}. - karda
- x
_{1}is a card [small nearly-2-dimensional shape/form] of material x_{2}, shape x_{3}. - pinta
- x
_{1}is flat/level/horizontal in gravity/frame of reference x_{2}. - sefta
- x
_{1}is surface/face [bounded shape/form] of [higher-dimension] object x_{2}, on side x_{3}, edges x_{4}. - tapla
- x
_{1}is a tile/cake [shape/form] of material x_{2}, shape x_{3}, thickness x_{4}. - xutla
- x
_{1}is smooth/even/[soft/silky] in texture/regularity. - pitrklaine
- x
_{1}is a Klein bottle.