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to improve a machine, computer system, etc. in terms of efficiency, standards, etc.
to improve something to a higher level of quality, significance, or importance
to provide someone with a better seat on an airplane or a better room in a hotel than the one for which they have paid
to receive better conditions without actively seeking them
to promote or elevate an employee to a higher position, level, or rank
the process of improving a computer system, machine, etc. in a way that it is more efficient or powerful
hardware that provides better performance than an earlier version did
the property possessed by a slope or surface that rises
a reservation that is improved
software that provides better performance than an earlier version did
an upward slope or grade (as in a road)
upgrade
grade
