Lexical Definition

‎πλάνος‎ plános (plan'-os) deceiving ^G:A
of uncertain affinity

--deceiver, seducing.

• roving (as a tramp), i.e. (by implication) an impostor or misleader

Abbott-Smith

πλάνος, -ον, [in LXX: Jb 19:4 (מְשׁוּגָה), Je 23:32*;]
1. wandering.
2. leading astray, deceiving: πνεύματα π., I Ti 4:1. As subst., ὁ π., a deceiver, impostor: Mt 27:63, II Co 6:8, II Jo 1:7.†

Abbott-Smith References

Liddell-Scott-Jones

πλάνος [ᾰ], ον,

__1 active, leading astray, deceiving, π. κατέσειον ἐδωδάν the bait, [Refs 3rd c.BC+]; π. δῶρα, ἄγρα, [NT+2nd c.BC+]
__2 passive, wandering, roaming, fickle, ποικίλον πρᾶγμ᾽ ἐστὶ καὶ πλάνον τύχη [Refs 4th c.BC+]; π. φέγγη planets, [Refs 4th c.AD+]
__II substantive πλάνος, ὁ, ={πλάνη}, wandering, roaming, [Refs 5th c.BC+]
__II.b κερκίδος πλάνοι, of the act of weaving, [Refs 5th c.BC+]
__II.2 metaphorically, φροντίδος πλάνοι wanderings of thought, [Refs 5th c.BC+]; π. φρενῶν wandering of mind, madness, [Refs 5th c.BC+]; πλάνοις in uncertain fits, of a disease, [Refs 5th c.BC+]; ={πλάνη}[Refs 5th c.BC+]
__II.3 digression, [Refs]
__II.4 error, [Refs 1st c.AD+]; grammatical mistake, [Refs 2nd c.AD+]
__III of persons, πλάνος, ὁ, vagabond,impostor, [NT+4th c.BC+]

_{LSJ Scripture Refs: 1Tim.4.1 ☩ Matt.27.63}