Definitions for "Challenger"
It was the U.S. space shuttle that exploded killing seven astronauts.
The second space shuttle to be launched into orbit. It was destroyed in 1986 after an explosion occurred a few seconds into flight.
In 1986, one of NASA's space shuttles, the "Challenger," exploded shortly after takeoff, killing its crew. The tragedy delayed space-shuttle launchings for three years.
Modified Caterpillar agricultural tractors used for ferrying heavy equipment on the High Antarctic Plateau. Between 360 and 600 horse powers depending on the version. Right: Caterpillar Challenger Traverse Special before Concordia.
a vehicle marketed by Caterpillar as a tractor
The candidate trying to unseat the person in office, or incumbent.
An individual who challenges an incumbent during en election for a particular political office. | The challenger had served as a county commissioner. [ Lesson 5
Keywords:  rumour, unsubstantiated
an unsubstantiated rumour
Keywords:  famicom, hudson, nintendo, japan, soft
Challenger was a game for the Nintendo Famicom, written by Hudson Soft and released only in Japan, in 1985.
the contestant you hope to defeat; "he had respect for his rivals"; "he wanted to know what the competition was doing"
Locomotive with 4-6-6-4 wheel arrangement (refer Whyte)
Keywords:  ladder, tier, pro, semi, match
(1) player who initiates a ladder match, (2) low tier or semi-pro event
An entity that requests and has the ability to interpret integrity metrics from a Subsystem.
Keywords:  one
One who challenges.