jacob's ladder meaning and definition

JACOB'S LADDER noun

Definition of Jacob's ladder (noun)

1. pinnate-leaved European perennial having bright blue or white flowers
   • synonyms: charity, Greek valerian, Polemonium caeruleum, Polemonium van-bruntiae, Polymonium caeruleum van-bruntiae
2. (nautical) a hanging ladder of ropes or chains supporting wooden or metal rungs or steps
   • synonyms: jack ladder, pilot ladder