εἷς

one

Definition

The Greek word εἷς primarily means 'one' and functions as both a numeral and an adjective. It can denote a single entity, as in 'one God' (Romans 3:30), or emphasize unity, such as in 'one body' (1 Corinthians 12:12). In some contexts, it carries the sense of 'a certain one' or 'someone' (John 6:9). It is also used idiomatically in phrases like 'one another' (e.g., John 13:34) to express mutual relationships. A significant theological usage contrasts 'one' with 'many,' as seen in Romans 5:12, where one man's sin brought death to all.

Biblical Usage

Εἷς is used frequently throughout the New Testament, appearing in narrative, epistolary, and theological contexts. It often functions as a simple numeral (e.g., 'one of you,' Matthew 26:21) but is also prominent in statements of theological unity, such as the oneness of God (Mark 12:29) and the unity of believers in Christ (Galatians 3:28). In the Gospels, it is common in parables and teachings (e.g., the 'one' lost sheep in Luke 15:4). The Johannine literature and Pauline epistles use it extensively to develop themes of divine oneness and corporate unity.

Etymology

Εἷς is the native Greek numeral for 'one,' derived from the Proto-Indo-European root *sem-/*sm-, which also gives rise to Latin 'unus' and English 'one.' It is the masculine form, with μία (mia) as feminine and ἕν (hen) as neuter. As a basic numeral, its meaning has remained stable, though its syntactic functions (e.g., as an adjective or pronoun) are context-dependent.

Semantic Range

This word is theologically significant, especially in articulating monotheism (e.g., 'The Lord our God, the Lord is one,' Mark 12:29) and the unity of the Godhead (e.g., 'one Lord, one faith, one baptism,' Ephesians 4:5). It underpins the doctrine of the unity of the church as 'one body' in Christ (1 Corinthians 12:12-13) and is central to the contrast between the 'one' Adam and the 'one' Christ in Pauline soteriology (Romans 5:12-19). Understanding its use enriches reading by highlighting biblical themes of uniqueness, singularity, and unifying purpose.

In the Greco-Roman world, the concept of 'one' was used in philosophical discussions about unity versus plurality and in political contexts emphasizing collective identity. The biblical usage, particularly in Jewish monotheistic confession (the Shema, Deuteronomy 6:4, echoed in Mark 12:29), stood in contrast to the polytheistic environment. The emphasis on 'one' body or 'one' faith in the New Testament often served to unify diverse ethnic and social groups (Jew and Gentile, slave and free) into a single community, countering prevailing societal divisions.

μόνος (monos, G3441) — emphasizes being alone or sole, rather than the numeral 'one.' πρῶτος (prōtos, G4413) — means 'first' in sequence or importance. ὅλος (holos, G3650) — means 'whole' or 'entire,' focusing on completeness rather than singularity.

Word Details

Scripture References