incomplete; (of an idea or scheme) not fully planned or carefully considered, ill-conceived, unsound or badly thought-out; (of a person) foolish or having no common sense.
Used other than figuratively or idiomatically: Partially cooked by heating in an oven.
Lacking personal depth and substance; conceited, vain, shallow, superficial.
Having length, but no width, height or depth.
Lacking depth or believability; flat.