an unpleasant feeling of coldness in the atmosphere, one's surroundings, or the body

there was a chill in the air

the draughty chill of the castle

heat exhaustion symptoms include nausea, chills, dizziness and dehydration

a metal mould, often cooled, designed to ensure rapid or even cooling of metal during casting

make (someone) cold

they were chilled by a sudden wind

horrify or frighten (someone)

the city was chilled by the violence

calm down and relax

they like to get home, have a bath, and chill out