lag

lag (http://definr.com/lag)

     n 1: the act of slowing down or falling behind [syn: slowdown,
          retardation]
     2: the time between one event, process, or period and another
        [syn: interim]
     3: one of several thin slats of wood forming the sides of a
        barrel or bucket [syn: stave]
     v 1: hang (back) or fall (behind) in movement, progress,
          development, etc. [syn: dawdle, fall back, {fall
          behind}]
     2: lock up in jail [syn: imprison, incarcerate, immure, {put
        behind bars}, jail, jug, gaol, put away, remand]
     3: throw or pitch at a mark, as with coins
     4: cover with lagging to prevent heat loss; "lag pipes"