Definition:-

• A series of linked metal rings used for fastening or securing something, or for pulling loads. (noun)
• A sequence of items of the same type forming a line. (noun)
• A jointed measuring line consisting of linked metal rods. (noun)
• A structure of planks projecting horizontally from a sailing ship's sides abreast of the masts, used to widen the basis for the shrouds. (noun)
• Fasten or secure with a chain. (verb)