What is the meaning of Ab-?

From.

Away from; outside of.

A unit of electromagnetic charge in the centimeter-gram-second system: the abcoulomb.

Separable verb prefix that indicates removal or quitting, off, away.

Separable verb prefix that indicates a downward movement, down.

Separable verb prefix that indicates from or of.

Noun prefix that indicates being different from the source or deviation.

ab- (from; away from; outside of)

ab- (away from; outside of)

from, away, away from

off

at a distance

completely, thoroughly

absence of

more remote

removed by three generations

ab-

Source: wiktionary.org