Definitions

1. noun

A succulent plant (Sempervivum tectorum) with rosettes of fleshy leaves, often grown on roofs to ward off lightning.

“The old house in the countryside had a charming houseleek growing on its roof.”

2. noun

The plant Sempervivum tectorum, especially when considered as a symbol of good luck.

“The houseleek in Irish folklore was a symbol of good fortune and protection from evil spirits.”