Lexical Definition

‎ἀντίτυπον‎ antítypon (an-teet'-oo-pon) representation G:A
neuter of a compound of ‎ἀντί‎ and ‎τύπος‎

(like) figure (whereunto).

Usage: 2 forms in 2 verses
Form Translated As     In Verse(s)
ἀντίτυπον prefigures 1Pet.3.21
ἀντίτυπα copies Heb.9.24

Abbott-Smith

** ἀντί-τυπος, -ον (v.s. τύπος), [in LXX: Es 3:13 A*;]
1. act. striking back; metaph., resisting, adverse.
2. Pass. struck back; metaph., corresponding to (MM, VGT, s.v.);
(a) as impression of a seal or copy of an archetype (τύπος) (RV, like in pattern), He 9:24;
(b) as the reality (of which τύπος is the copy or adumbration) (RV, after a true likeness), I Pe 3:21 (Cremer, 357).†

Abbott-Smith References

Book Refs
Ezra 3:13
Hebrews 9:24
1 Peter 3:21

Liddell-Scott-Jones

ἀντίτυπος-ος, ον,

rarely η, ον, see below 11.1a: (τύπτω): — repelled by a hard body, τύπος . blow and counter-blow, of the hammer and anvil, Oracle texts cited in [Refs 5th c.BC+]; of sound, echoed, echoing, στόνος[Refs 5th c.BC+]; κατὰ τὸ . by repercussion, of an echo, [Refs 2nd c.AD+]; of light, reflected, ἀκτῖνες[Refs 3rd c.AD+]

__2 corresponding, as the stamp to the die, ἅγια . τῶν ἀληθινῶν figuring or representing the true, [NT]; resembling, with dative, [Refs 4th c.AD+]: hence, feigned, counterfeit, [Refs]
__2.b corresponding, φιλότης mutual affection, [Refs]
__2.c substantive ἀντίτυπος, , or ἀντίτυπον, τό, image, Ἄμμωνος κεραοῦ χάλκεον .[Refs]; ἀντίτυπον, τό, ={ἀντίγραφον}, reproduction, copy, [Refs 4th c.AD+]: metaphorically, antitype, [Refs 3rd c.AD+]
__II active, repelling, as a hard body does: hence,
__II.1 firm, resistent, χωρίον[Refs 5th c.BC+]; rigid, inelastic, [Refs 4th c.AD+]; -ώτερα ὄντα, of a horse's fetlocks, [Refs 5th c.BC+]; οἱ ἐν ἀντιτύποις περίπατοι walking on hard ground, [Refs 4th c.BC+]; ἀντιτυπώτατον εἶδος, explanation of σκληρόν, most resistent, [Refs 5th c.BC+]
__II.1.b metaphorically, stubborn, obstinate, ἄνθρωποι[Refs 5th c.BC+]; harsh-sounding, ἁρμονίαι[Refs 1st c.BC+]; of colour, glaring, [Refs 1st c.AD+]
__II.2 opposed to, ἦθος δόλιον πίστιος ἀντίτυπον the reverse of.., [Refs 6th c.BC+]; . Διός the adversary of Zeus, [Refs 4th c.BC+]; adverse, of events, [Refs 5th c.BC+]opposite, over against, [Refs 2nd c.BC+]

LSJ Scripture Refs: Heb.9.241Pet.3.21