This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
闝 combines 門 (gate) with 敗 (defeat/failure). The exact historical development is uncertain, and the character is rare in modern use.
A gate 門 enclosing defeat 敗 suggests a place of failure or ruin, but its actual meaning is unclear.
For ヒョウ, imagine a defeated army fleeing through a gate, shouting 'hyou!' in panic: hyou -> ヒョウ.