Learner's definition of INCONSISTENT
[more inconsistent; most inconsistent]
: not consistent: such as a : not always acting or behaving in the same way b : not continuing to happen or develop in the same way c : having parts that disagree with each other
: not in agreement with something
Their descriptions of the accident were inconsistent.
The results of the two experiments were inconsistent.
She was inconsistent in her argument. [=her argument included parts that did not agree with one another]