fill

n. satisfying amount of food or drink; amount needed to fill a receptacle; something used to fill; something which fills

v. put in until full; supply with as much as is needed; satisfy, satiate (one's appetite); put a filling in a dental cavity; meet a need; substitute for, do the job of; supply information; prepare a medical prescription

Fill may refer to:Fill dirt, soil added to an areaFlood fill, in graphic design fills a color, pattern, or texture in an areaFill (music), a short segment of instrumental musicIn textiles, the filling yarn is the same as weft, the yarn which is shuttled back and forth across the warp to create a woven fabricIn finance, a fill is the fulfillment of a part or whole of an order at a given price by a broker or counterpartyFill flash is a technique in photography where the flash is used in bright locations to prevent shadows from being underexposed.
See more at Wikipedia.org...

See bit stuffing.

The price at which an order is executed.