Lexical Definition

‎παράκλητος‎ paráklētos (par-ak'-lay-tos) counsellor ^G:N-M
advocate, comforter.

• an intercessor, consoler

Abbott-Smith

** παρά-κλητος, -ον (< παρακαλέω), [in Aq., Th.: Jb 16:2*;]
called to one's aid in a judicial cause (Dion. Cass.); hence, most freq. as subst., ὁ π., an advocate, pleader, intercessor (Dem., al.; so in Rabbinic lit., פְּרַקְלִיטָא), "a friend of the accused person, called to speak to his character, or otherwise enlist sympathy in his favour" (Field, Notes, 102). In NT, specif., ὁ π.,
(a) of Christ, I Jo 2:1 (v. ICC, Jo. Epp., 23 ff.);
(b) of the Holy Spirit (AV, comforter; but v. opp. c.), Jo 14:16, 26 15:26 16:7 (cf. also Abbott, Essays, 86, 97; Deiss., LAE, 339 f.; MM, xviii; Westc., Jo., ii, 188 ff.).

Abbott-Smith References

Liddell-Scott-Jones

παράκλητος-κλητος, ον,

called to one's aid, in a court of justice: as substantive, legal assistant, advocate, [Refs 4th c.BC+]

__2 summoned, δοῦλοι [Refs 2nd c.AD+]
__II intercessor, [NT+1st c.AD+], of the Holy Spirit, [NT]

_{LSJ Scripture Refs: John.14.16 ☩ 1John.2.1}