RhymeZone: nextstep definitions

Definitions of NeXTSTEP:

noun: (computing) An object-oriented, multitasking operating system developed by NeXT Computer in the late 1980s and early 1990s, based on UNIX.
noun: (NASA, space science) Name for a set of projects that aim to develop technology for human spaceflight in deep space exploration.

(Definitions from Wiktionary)