1: deficient in originality or creativity; lacking powers of invention:
"a sterile ideology lacking in originality";
"unimaginative development of a musical theme";
"uninspired writing"
(syn: sterile, uninspired, uninventive)

2: dealing only with concrete facts

3: lacking spontaneity or originality or individuality;
"stereotyped phrases of condolence";
"even his profanity was unimaginative"
(syn: stereotyped, stereotypic, stereotypical)