Learner's definition of DISADVANTAGEOUS
[more disadvantageous; most disadvantageous]formal
: making it harder for a person to succeed or to do something : causing someone to have a disadvantage
They might have to resell the property at a disadvantageous time.
Minority groups find themselves in a disadvantageous position.
The current system is disadvantageous to women.
— disadvantageouslyadverb,[more disadvantageously; most disadvantageously]