- adjective referring to a situation that is as good as can be expected or the best possible
- adjective perfect, very good for something
- Pertaining to a component, circuit, device, piece of equipment, system, process, operation, result, state, substance, or entity which corresponds to a theoretical perfection, or that conforms completely to a theory pertaining to a theoretical perfection. For example, an ideal radiator, or an engine which converts 100% of its input power or energy into useful power or energy, such as work. Also called perfect (1).