A bucket is a round metal or plastic container with a handle attached to its sides. Buckets are often used for holding and carrying water. We drew water in a bucket from the well outside the door A bucket of water is the amount of water contained in a bucket. She threw a bucket of water over them. bucket down to rain very hard = pour
an individual delay bucket represents a traffic allocation, which is replenished at a given rate (up to a given limit) and causes traffic to be delayed when empty