1.Definition: dealing only with concrete facts

2.Definition: deficient in originality or creativity; lacking powers of invention

"Unimaginative development of a musical theme"

Related Adjective(s):sterile, uninspired, uninventive

3.Definition: lacking spontaneity or originality or individuality

"Even his profanity was unimaginative"

Related Adjective(s):stereotyped, stereotypic, stereotypical