1
: hostile toward a rival or one believed to enjoy an advantage : envious
His success made his old friends jealous.
They were jealous of his success.
2
a
: intolerant of rivalry or unfaithfulness
jealous of the slightest interference in household management—Havelock Ellis
b
: disposed to suspect rivalry or unfaithfulness
a jealous husband
3
: vigilant in guarding a possession
new colonies were jealous of their new independence—Scott Buchanan
jealously
adverb
jealousness
noun
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Merriam-Webster unabridged
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