GC: n
S: http://www.unicef.org/about/execboard/files/2010-7-Rev.1-ODS-English.pdf (last access: 22 April 2013); http://www.eesi.org/press-releases/view/action-on-climate-change-is-a-moral-imperative-new-u.n.-report-underscores- (last access: 2 September 2014).
N: Something that must happen because it is the right thing. Tackling the issue of poverty is a moral imperative.
S: http://www.macmillandictionary.com/us/dictionary/american/moral-imperative (last access: 2 September 2014)
SYN:
S: