Meaning : The quality of having a superior or more favorable position.
Example :
The experience gave him the advantage over me.
Synonyms : vantage
The quality of having an inferior or less favorable position.
disadvantageMeaning : (tennis) first point scored after deuce.
Meaning : Give an advantage to.
Example :
This system advantages the rich.
Put at a disadvantage. Hinder, harm.
This rule clearly disadvantages me.