monogenes describes someone presented as the sole or uniquely identified child, son, or divine figure in a verse.

The term most often marks a divine figure or Son as uniquely identified within statements about revelation, sending, giving, belief, or God’s self-disclosure. It also describes a person’s sole child in scenes involving a widow’s son, a dying daughter, a distressed father’s son, and Isaac.

1. Unique divine figure or Son · dominant

   In John 1:14 the genitive singular masculine form occurs in the clause describing glory seen in the Word made flesh, which the APB renders as “the unique one from the father.” In John 1:18 it stands in a nominative singular masculine description of the one at the father's side who has made God known; John 3:16, John 3:18, and 1 John 4:9 place masculine forms in clauses about the Son being given, believed in, or sent into the world.

   John 1:14John 1:18John 3:16John 3:181 John 4:9
2. A person's sole child · common

   The nominative singular forms describe the deceased son of a widow in Luke 7:12, a man's dying daughter in Luke 8:42, and the son for whom a man begs help in Luke 9:38. Hebrews 11:17 uses the accusative singular masculine form in the account of Abraham offering Isaac, whom the APB calls “his only son.”

   Luke 7:12Luke 8:42Luke 9:38Hebrews 11:17

In the Anselm Project Bible: The APB varies between “unique one,” “unique God,” and “unique son” in the John passages, while it uses “only Son,” “only daughter,” and “only child” in other verses. These phrases show the verse-level presentation rather than fixed English equivalents.