What was a "stop" to you? Slow, tap the brakes, and go? (i.e. a rolling, or "California" stop?)
If you did not come to a complete stop at the limit line as required by the section, then you failed to comply. If you ask for the officer's definition, that implies to me that you did not actually stop, as in cease all movement, of the vehicle.
22450. (a) The driver of any vehicle approaching a stop sign at the
entrance to, or within, an intersection shall stop at a limit line,
if marked, otherwise before entering the crosswalk on the near side
of the intersection.
If there is no limit line or crosswalk, the driver shall stop at
the entrance to the intersecting roadway.
(b) The driver of a vehicle approaching a stop sign at a railroad
grade crossing shall stop at a limit line, if marked, otherwise
before crossing the first track or entrance to the railroad grade
crossing.
(c) Notwithstanding any other provision of law, a local authority
may adopt rules and regulations by ordinance or resolution providing
for the placement of a stop sign at any location on a highway under
its jurisdiction where the stop sign would enhance traffic safety.

