1.Definition: abjectly submissive; characteristic of a slave or servant

"She has become submissive and subservient"

Related Adjective(s):slavish, submissive

2.Definition: compliant and obedient to authority

"Editors and journalists who express opinions in print that are opposed to the interests of the rich are dismissed and replaced by subservient ones"

3.Definition: serving or acting as a means or aid

Related Adjective(s):implemental, instrumental