Lexical Definition

‎ἑτερόγλωσσος‎ heteróglōssos (het-er-og'-loce-sos) in another language ^G:A
from ‎ἕτερος‎ and ‎γλῶσσα‎

man of other tongue.

• other- tongued, i.e. a foreigner

Abbott-Smith

**† ἑτερό-γλωσσος (Att. -ττος), -ον, [in Aq.: Ps 113 (114):1*, Is 33:19 * ;]
of alien speech, of another tongue (v. Cremer, 681): I Co 14:21 (aliter in LXX).†

Abbott-Smith References

Liddell-Scott-Jones

ἑτερόγλωσσος-γλωσσος,

Attic dialect ἑτερόγλωσσοςγλωττος, ον, of other (i.e. foreign) tongue, [Refs 2nd c.BC+]; ἐν ἑτερογλώσσοις λαλεῖν by men of foreign tongue, [NT+4th c.BC+]

__2 of diverse tongues, ζῷα [Refs 1st c.AD+]

_{LSJ Scripture Refs: 1Cor.14.21}