be an allegory (the Greek word itself)

Boyd’s Bible Dictionary:

(other speech). That figure of speech by which a subject is set forth under the guise of some other subject (Gal. 4:24).

Concise Bible Dictionary:

The word ἀλληγορέω, occurs only in Galatians 4:24. The passage does not mean that Abraham having two sons was an allegory: it was history, but that history had an allegorical application, which Paul, by the Holy Ghost, fully explains. The Greek word signifies “to speak otherwise,” and an allegory is a description of one thing under the image of another.

Strong’s Dictionary of Greek Words:

Number:

238 (find all occurrences in KJV Bible)

Greek:

ἀλληγορέω

Transliteration:

allegoreo

Phonic:

al-lay-gor-eh’-o

Meaning:

from 243 and ἀγορέω (to harangue (compare 58)); to allegorize

KJV Usage:

be an allegory (the Greek word itself)