I. ˈ ̷ ̷ˌ ̷ ̷ noun
( -s )
Etymology: card (III) + board
: a stiff moderately thick paperboard sometimes coated and of a quality suitable for signs or printed matter — compare board I 6a
II. adjective
1. : made of or as if of cardboard : flat : two-dimensional
cardboard Spanish ironwork — Cyril Connolly
2. : unreal , unlifelike : stiff : stereotyped
the detective story is partial to cardboard characters and notoriously fatal to any real emotion — J.P.Bishop