means A sweet, sugary fluid secreted by flowers to attract pollinators, or more loosely any deliciously sweet drink.

from From Greek 'nektar,' the legendary drink of the gods that kept them deathless — often traced to roots meaning 'death' (nek-) plus 'overcoming' (-tar), so 'overcoming death.' For centuries it named only the divine beverage of Olympus; the leap to flower-juice came later, in the 17th century, when botanists borrowed the heavenly word for the humble nectar that bees so adore.