What is the meaning of Trapp?

Any dark-colored, fine-grained, non-granitic igneous rock, Alternative form of trap.

stairs, stairway, staircase, steps (e.g. outdoors)

stairs, stairway, staircase, steps (e.g. outdoors)

stairs, stairway, staircase, steps (e.g. outdoors)

any species from the bustard family of birds (Otididae)

Source: wiktionary.org