Jealous

Webster's Dictionary of the English Language

·adj Apprehensive; anxious; suspiciously watchful.

II. Jealous ·adj Zealous; solicitous; vigilant; anxiously watchful.

III. Jealous ·adj Exacting exclusive devotion; intolerant of rivalry.

IV. Jealous ·adj Disposed to suspect rivalry in matters of interest and affection; apprehensive regarding the motives of possible rivals, or the fidelity of friends; distrustful; having morbid fear of rivalry in love or preference given to another; painfully suspicious of the faithfulness of husband, wife, or lover.