1st, yes, single-action revolvers are analogous to bolt action rifles. 2nd, no single actions are not considered semi-automatic. Single Action or double action refers specifically to the trigger function(s).
Semi-automatic or fully-automatic refers to functions after the hammer falls. Semi-autos automatically cock the hammer and load the next round, then waits for you to pull the trigger again. One trigger pull fires one round, and loads one round. Fully automatic will fire a round, cock the hammer, load the next round and automatically fire it, continuously until the trigger is released or source of ammo runs dry.
A semi-auto pistol can be single-action (see:1911) or double-action (see: M9).