cardboard

noun

1. a thin, stiff pasteboard, used for signs, boxes, etc.

adjective

2. resembling cardboard, especially in flimsiness: an apartment with cardboard walls.
3. not fully lifelike; shallow; two-dimensional: a play with cardboard characters.

noun

1. 1. a thin stiff board made from paper pulp and used esp for making cartons
   2. (as modifier)cardboard boxes

adjective

2. (prenominal) without substancea cardboard smile; a cardboard general

n.

1848, from card (n.) + board (n.1). Figurative sense is from 1893. An earlier word for the same stuff was card paper (1777).