A focal point may mean the same as focus. It may also mean:

• focus (optics) is the point at which initially collimated rays of light meet after passing through a convex lens, or reflecting off of a concave mirror.
• In mathematics, focal point means a critical point of a distance function.
• In an antenna (electronics):
  • The driven element, directly connected to the transmission line or source
  • The passive radiator
• In game theory, a Schelling point is an equilibrium more likely to be chosen by the players because it seems special, natural or relevant to them.