|Origin:||sulter 'to be uncomfortably hot' (16-17 centuries), from swelter|
weather that is sultry is hot with air that feels wet [= humid]:
a hot and sultry day
Since the rain, the air had become heavy and still and sultry.
a woman who is sultry makes other people feel strong sexual attraction to her:
She threw Carlo a sultry glance.
a sultry film star
—sultriness noun [uncountable]