Found the proposed definition, my emphases to point out the possible group ride or Strava implication. Can't find anything on that "10 or more" thing.
"A race refers to a head-to-head contest of speed or competition on bicycles or self-propelled or motorized vehicle inclusive of a starting line of massed riders and in which two or more riders ride abreast on a highway. The course may be point-to-point, a large circuit, or repeated laps of a shorter circuit. A race includes but is not necessarily limited to an organized event such as a road race, criterium, or portion of a duathlon, triathlon, or other multisport event.
A time trial is a comparative contest of speed or competition in which individuals or small teams of riders, separately ride the same route and distance for elapsed time. Time trials are generally started at preset intervals and held on an out-and-back or circuit course. A time trial includes but is not necessarily limited to an organized event in a single day or series of days which results in rankings or comparative time result monitoring by officials, awards, or qualification for other time trial competitions or events.