n.
 the way in which something is arranged or presented. 
▸Computing  a defined structure for the processing, storage, or display of data.
v.
 (formats, formatting, formatted)
 (especially in computing) arrange or put into a format. 
▸prepare (a storage medium) to receive data.
Etymology
  C19: via Fr. and Ger. from L. formatus (liber) ‘shaped (book)’.