Word Summary
zēlos: to have warmth of feeling for or against, to be zealous or jealous
Original Word: ζῆλος
Transliteration: zēlos
Phonetic Spelling: (dzay'-los)
Part of Speech: Noun, Masculine; Noun, Neuter
Short Definition: to have warmth of feeling for or against, to be zealous or jealous
Meaning: to have warmth of feeling for or against, to be zealous or jealous
Strong's Concordance
emulation, jealousy, zeal.

From zeo; properly, heat, i.e. (figuratively) "zeal" (in a favorable sense, ardor; in an unfavorable one, jealousy, as of a husband (figuratively, of God), or an enemy, malice) -- emulation, envy(-ing), fervent mind, indignation, jealousy, zeal.

see GREEK zeo

Thayer's Greek Lexicon
STRONGS NT 2205: ζῆλος

ζῆλος, ζήλου, , and (in Philippians 3:6 L T Tr WH; (2 Corinthians 9:2 T Tr WH)) τό ζῆλος (Ignatius ad Trall. 4 [ET]; διά ζῆλος, Clement of Rome, 1 Cor. 4, 8 [ET] ("in Clement of Rome, §§ 3, 4, 5, 6 the masculine and neuter seem to be interchanged without any law" (Lightfoot). For facts see especially Clement of Rome, edition 2 Hilgenfeld (1876), p. 7; cf. Wit. Appendix, p. 158; Winers Grammar, § 9, N. 2; Buttmann, 23 (20)); (from ζέω (Curtius, § 567; Vanicek, p. 757)); the Sept. for קִנְאָה; excitement of mind, ardor, fervor of spirit;

1. zeal, ardor in embracing, pursuing, defending anything: 2 Corinthians 12:11; 2 Corinthians 9:2; κατά ζῆλος, as respects zeal (in maintaining religion), Philippians 3:6; with the genitive of the object, zeal in behalf of, for a person or thing, John 2:17 from Psalm 68:10 (); Romans 10:2 (1 Macc. 2:58; Sophocles O. C. 943); ὑπέρ τίνος, genitive of person, 2 Corinthians 7:7; Colossians 4:13 Rec. with subject. genitive ζήλῳ Θεοῦ, with a jealousy such as God has, hence, most pure and solicitous for their salvation, 2 Corinthians 11:2; the fierceness of indignation, punitive zeal, πυρός (of penal fire, which is personified (see πῦρ, at the end)), Hebrews 10:27 (Isaiah 26:11; Wis. 5:18).

2. an envious and contentious rivalry, jealousy: Romans 13:13; 1 Corinthians 3:3; James 3:14, 16; ἐπλήσθησαν ζήλου, Acts 5:17; Acts 13:45; plural ζῆλοι, now the stirrings or motions of ζῆλος, now its outbursts and manifestations: 2 Corinthians 12:20; Galatians 5:20; but in both passages L T Tr (WH, yet in Galatians, the passage cited WH only in text) have adopted ζῆλος (ζῆλοι τέ καί φθόνοι, Plato, legg. 3, p. 679 c.). (On the distinction between ζῆλος (which may be used in a good sense) and φθόνος (used only in a bad sense) cf. Trench, Synonyms, § xxvi.; Cope on Aristotle, rhet. 2, 11,