Lexical Definition

‎γελάω‎ geláō (ghel-ah'-o) to laugh ^G:V
of uncertain affinity

laugh.

• to laugh (as a sign of joy or satisfaction)

Abbott-Smith

γελάω, -ῶ, [in LXX chiefly for צחק, שׂחק ;]
to laugh: Lk 6:25; fut., γελάσω) (M, Pr., 154), ib. 21 (cf. κατα-γελάω).†

Abbott-Smith References

Liddell-Scott-Jones

γελάω,

Epic dialect γελόω [Refs 8th c.BC+], Aeolic dialect γέλαιμι [Refs]; Epic dialect participle γελόωντες [Refs 8th c.BC+]; Epic dialect imperfect γελώων or -οίων[Refs]; Doric dialect participle γελᾶσα, 3rd.pers. plural γελᾶντι, [Refs 3rd c.BC+]; Aeolic dialect γελαίσας [Refs 7th c.BC+]: Attic dialect future γελάσομαι [Refs 5th c.BC+]: aorist ἐγέλᾰσα [Refs 5th c.BC+]; Epic dialect ἐγέλασσα [Refs 8th c.BC+]; Doric dialect ἐγέλαξα [Refs 3rd c.BC+]; 3rd.pers. plural γέλαν for ἐγέλασαν poetical cited in [Refs]:—passive, future -ασθήσομαι[Refs 2nd c.AD+]: aorist ἐγελάσθην [Refs 5th c.BC+]perfect γεγέλασται [Refs 2nd c.AD+]

__I absolutely, laugh, ἁπαλὸν γελάσαι [Refs 8th c.BC+]; ἡ δ᾽ ἐγέλασσε χείλεσιν, of feigned laughter, [Refs 8th c.BC+]; ἐγέλασσε δέ οἱ φίλον ἦτορ his heart laughed within him,[Refs 5th c.BC+] —passive, εἵνεκα τοῦ γελασθῆι αι for the sake of a laugh being raised, [Refs 4th c.BC+]
__I.2 of things, γέλασσε δὲ πᾶσα περὶ χθών [Refs 8th c.BC+]
__II laugh at, ἐπ᾽ αὐτῷ ἡδὺ γέλασσαν [Refs 8th c.BC+]; γελᾷ δὲ δαίμων ἐπ᾽ ἀνδρὶ θερμῷ laughs scornfully at.., [Refs 4th c.BC+]; ἐπί τινι at a thing, [Refs 5th c.BC+]; ἐγέλασα ψολοκομπίαις was amused at them, [Refs 5th c.BC+]
__II.2 with accusative, deride, τινά [Refs 5th c.BC+]; τί δὲ τοῦτ᾽ ἐγέλασας ἐτεόν; what is this you are laughing at? [Refs 5th c.BC+]:—passive, to be derided, [Refs 5th c.BC+]