1. 缺乏想象力的；刻板的
If you describe someone as unimaginative, you are criticizing them because they do not think of new methods or things to do.

2. 乏味的；无吸引力的
If you describe something as unimaginative, you mean that it is boring or unattractive because very little imagination or effort has been used on it.

1. lacking spontaneity or originality or individuality

e.g. stereotyped phrases of condolence
even his profanity was unimaginative

Synonym: stereotypedstereotypicstereotypical

2. deficient in originality or creativity
lacking powers of invention

e.g. a sterile ideology lacking in originality
unimaginative development of a musical theme
uninspired writing

Synonym: sterileuninspireduninventive

3. dealing only with concrete facts