An obstacle, delay, disadvantage, blow (an adverse event which retards or prevents progress towards a desired outcome)
An offset to the temperature setting of a thermostat to cover a period when more or less heating is required than usual.
A step-like recession in a wall.
The required distance between a structure and a road.
An improvement
An upward grade or slope.
An improved component or replacement item, usually applied to technology
Up a slope or grade.
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.
To improve in condition or status.