1.
feeling resentment against someone because of that person's rivalry,success, or advantages (often followed by of):
He was jealous of his rich brother.
2.
feeling resentment because of another's success, advantage, etc.(often followed by of):
He was jealous of his brother's wealth.
3.
characterized by or proceeding from suspicious fears or enviousresentment:
a jealous rage; jealous intrigues.
4.
inclined to or troubled by suspicions or fears of rivalry, unfaithfulness,etc., as in love or aims:
a jealous husband.
5.
solicitous or vigilant in maintaining or guarding something:
The American people are jealous of their freedom.
6.
Bible. intolerant of unfaithfulness or rivalry:
The Lord is a jealous God.