(countable) A banknote or coin with a denomination of 50. / (cricket) A batsman's score of at least 50 runs and less than 100 runs.

Third-person singular simple present indicative form of encrust

Of or pertaining to Howard Zinn (1922–2010), American historian, playwright, philosopher and socialist thinker.

A kind of boat that can be collapsed for greater portability. / (graphical user interface) A display element that can be collapsed to hide it from view.