IMO cold call should be differnt in NL than limit.
These definitions are prolly wrong but imo they should be like this.
[bfsy]Preflop:[/bfsy]
In NL [bfsy]Cold call[/bfsy] should be when third person calls 3bet. Even blinds. Example UTG raises 3bb, UTG+1 raises 10bb, button (or anyone from blinds) [bfsy]cold calls[/bfsy] 13bb.
[bfsy]Over call[/bfsy] when someone makes a call behind other callers. Example UTG raise 3bb UTG+1 calls 3bb then UTG+2 [bfsy]over calls[/bfsy].
Imo limping preflop should not be considered by definition a call.
These definitions would make sense to me in NL. But thats just my opinion.