A sudden downward slope.
A delivery; the act of leaving a package, etc.
A visitor to a website who ceases to continue using and navigating around the site after reaching some specified page; or such an act of cessation.
The precipitous outer side of a coral reef, facing the open sea.
A sudden decrease.
A space reserved outside a bus or railway station for vehicles stopping to drop off passengers for onward transit.
A time during which passengers, such as school children, are dropped off.
An upward grade or slope.
An improvement
An improved component or replacement item, usually applied to technology
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.
Up a slope or grade.