To be in the habit of choosing something rather than something else; to favor; to like better.
To present or submit (something) to an authority (now usually in "to prefer charges").
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.
An upward grade or slope.
An improvement
An improved component or replacement item, usually applied to technology
Up a slope or grade.