Ab-

From Latin ab-, from Proto-Indo-European *hâ‚‚epo ("off, away") (English off, of).

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See Proto-Indo-European *apo-.

Alternative forms

• a- found if the root word started with m, p, or v
• abs- found if the root word started with c or t

Full definition of ab-

Prefix

1. (non-productive) Fromabsorb
2. (non-productive) Away from; outside of.abnormal, abaxial.

Abbreviation of absolute.

Prefix

1. (physics) A unit of electromagnetic charge in the centimeter-gram-second system: the abcoulomb.