a set of tools or implements
a set of clothes, equipment, supplies, etc for use in a particular specified situation or activity
a first-aid kit
a set of parts ready to be assembled
a model aeroplane kit
a set of clothes and equipment for a particular use, esp that equipment carried by a member of the armed forces
get one's kit off
informal to undress
Middle English kitt, kyt wooden tub, prob from Middle Dutch kitte, kit jug, vessel. Current senses, of which sense 3 is the earliest (18th cent.) probably come from the idea of a collection of items packed in a container