A length of something wound or arranged in a spiral or sequence of rings. The electrician used a coil of wire to connect the circuits.
A device or component consisting of a series of loops, often used to produce electromagnetic fields or store energy. The ignition coil in the car was faulty and needed replacement.
A contraceptive device placed inside the uterus, also known as an intrauterine device (IUD). She decided to use a coil as her method of contraception.
A state of turmoil, confusion, or bustle (now chiefly literary or archaic, especially in the phrase "mortal coil"). Yearning to escape the daily coil of the city, he moved to the countryside.