To modernise.
To design and construct the contours of a vehicle etc. so as to offer the least resistance to its flow through a fluid.
To simplify or organize a process in order to increase its efficiency.
On a weather chart, a line that is tangent to the flow of the wind.
A line that is tangent to the velocity of flow of a fluid; equivalent to the path of a specific particle in that flow.
To replace with something better.
To improve, usually applied to technology, generally by complete replacement of one or more components
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.
To improve in condition or status.
Up a slope or grade.
An upward grade or slope.
An improvement
An improved component or replacement item, usually applied to technology