In reply to BusyLizzie:
> Wikipedia says free climbing is everything that isn't aid climbing: "Free climbing includes solo climbing, traditional climbing, sport climbing and bouldering". I didn't think that was the sense in which the term is used on this site. Put me right please.
Yes, I think that is how it's used on here and most places. But I think you'd only say "free climbing" when there's a possibility that you might use aid instead, e.g. on El Cap, or Kilnsey (and not on a boulder problem).