What is the meaning of Phenomenal?

Very remarkable; highly extraordinary; amazing.

Perceptible by the senses through immediate experience.

Of or pertaining to the appearance of the world, as opposed to the ultimate nature of the world as it is in itself.

phenomenal, adj. and n.”, in OED Online Paid subscription required, Oxford, Oxfordshire: Oxford University Press, launched 2000.

Source: wiktionary.org