Quick Definition
νόθος, η, ον Adj illegitimate, bastard
Strong's Definition
of uncertain affinity; a spurious or illegitimate son
KJV Usage: bastard
UBS Dictionary of the Greek New Testament
adjc. | -η, -ον
10.39 · Kinship Terms · Kinship Relations Involving Successive Generations
illegitimate, bastard pertaining to someone who is born out of wedlock and is thus without legal status or rights There may, however, be some serious problems involved in translating νόθοι in HEB 12:8, especially if νόθοι must be rendered in some languages as ‘sons whose parents are not married,’ for νόθοι occurs here in a highly figurative passage speaking of God as one’s parent. It may, therefore, be necessary to employ an expression such as ‘this means you are not his real sons’ or ‘... not sons who truly belong to him.’
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
νόθος, -η. -ov, illegitimate, bastard, i. e. born, not in lawful wedlock, but of a concubine or female slave: Heb. xii. 8; cf. Bleek adloc. (Sap. iv. 3; from Hom. down.)
Mounce Concise Greek Dictionary
νόθος nothos 1x
spurious, bastard, Heb. 12:8*
Abbott-Smith Greek Lexicon
** νόθος, -η, -ον,
[in LXX: Wi 4:3*;]
a bastard, base born, i.e. born of a slave or concubine: He 12:8.†
Liddell-Scott-Jones — Greek-English Lexicon
νόθος (nothos) — illegitimate. νόθ-ος, η, ον, also ος, ον [Refs 3rd c.BC+], bastard, baseborn, i.e. born of a slave or concubine, frequently in [Refs 8th c.BC+]; opposed to γνήσιος, [Refs 8th c.BC+]; ὅδ᾽, εἰ ν. τις, γνησίοις ἴσον σθένει [NT+8th c.BC+]
2. at Athens, child of a citizen father and an alien mother, [Refs 4th c.BC+]
3. plural, in Egypt, a class of temple-attendants, Wilcken [Refs 3rd c.BC+]
4. of animals, cross-bred, πρόβατα [Refs 3rd c.BC+]
II. generally, spurious, counterfeit, supposititious, of persons and things, λογισμῷ τινι ν. [Refs 5th c.BC+]; ἀοιδαί Call.[same place]; νόθον ἧπαρ ὁ σπλήν [Refs 4th c.BC+]; αἱ ν. πλευραί the false ribs, [Refs 2nd c.AD+]; ν. σάλπιγξ, of a serpent's hiss, [Refs 4th c.AD+]; ν. φέγγος, of the moon, opposed to γνήσιον, of the sun, [Refs 1st c.AD+]meretricious, Peripl.M. [Refs]. adverb -θως insincerely, disingenuously, [LXX+5th c.AD+]
II.2. of literary works, spurious, [Refs 3rd c.AD+]