One girl is jealous of another girls lunch.
- The definition of jealous is disliking when someone wants something you have.
An example of jealous is a husband who dislikes other men looking at his wife.
- The definition of jealous is guarding something that is yours.
An example of jealous is having asked your boss to not call you at home after work.
- very watchful or careful in guarding or keeping: jealous of one's rights
- resentfully suspicious of a rival or a rival's influence: a husband jealous of other men
- resentfully envious
- resulting from such feelings: a jealous rage
- Archaic requiring exclusive loyalty: “for I the Lord your God am a jealous God”
Origin of jealousMiddle English jelous ; from Old French gelos ; from Medieval Latin zelosus: see zeal
- Envious or resentful of the good fortune or achievements of another: I felt jealous when my coworker got a promotion.
- Fearful or wary of losing one's position or situation to someone else, especially in a sexual relationship: Her new boyfriend was jealous of her male friends.
- Having to do with or arising from feelings of envy, apprehension, or bitterness: jealous thoughts.
- Vigilant in guarding something: We are jealous of our good name.
- Intolerant of disloyalty or infidelity; autocratic: a jealous god.
Origin of jealousMiddle English jelous, from Old French gelos, jealous, zealous, from Vulgar Latin *zēlōsus, from Late Latin zēlus, zeal; see zeal.
(comparative more jealous, superlative most jealous)
- Suspecting rivalry in love; troubled by worries that one might have been replaced in someone's affections; suspicious of a lover or spouse's fidelity. [from 13th c.]
- Protective, zealously guarding, careful in the protection of something one has or appreciates. [from 14th c.]
- For you must not worship any other god, for the Lord, whose name is Jealous, is a jealous God. —Exodus 34:14 (NET)
- Envious; feeling resentful of someone for a perceived advantage, material or otherwise. [from 14th c.]
- Suspecting, suspicious.
Some usage guides seek to distinguish "jealous" from “envious”, using jealous to mean “protective of one’s own position or possessions” – one “jealously guards what one has” – and envious to mean “desirous of others’ position or possessions” – one “envies what others have”. This distinction is also maintained in the psychological and philosophical literature. However, this distinction is not reflected in usage, as reflected in the quotations of famous authors (above) using the word jealous in the sense “envious (of the possessions of others)”.
 From Old French jalous, from Late Latin zelosus, from Ancient Greek ζῆλος (zēlos, “zeal, jealousy”), from ζηλόω (zēloō, “to emulate, to be jealous”). Cognate to zeal.