To strengthen.
To accumulate, to pile up, to increase in stages.
To close up by building.
In solitaire card games, to place a card over another card of lower value. (e.g., place 5♦ over 4♣)
To erect; to construct.
To improve in condition or status.
To improve, usually applied to technology, generally by complete replacement of one or more components
To replace with something better.
To improve the equipment or furnishings of or services rendered to
To replace a program with a later version of itself, a version having a higher version number or marketed under a more recent product name.
Up a slope or grade.
An upward grade or slope.
An improvement
An improved component or replacement item, usually applied to technology