SOLIDARITY
solidarity
(noun) a union of interests or purposes or sympathies among members of a group
Source: WordNet® 3.1
Proper noun
Solidarity
(historical) A political movement begun in the labor unions of Poland that contributed to the fall of Communism in that country.
Etymology
Noun
solidarity (countable and uncountable, plural solidarities)
(countable) A bond of unity or agreement between individuals, united around a common goal or against a common enemy, such as the unifying principle that defines the labor movement; mutual support within a group.
(uncountable) Willingness to give psychological and/or material support when another person is in a difficult position or needs affection.
Source: Wiktionary
Sol`i*dar"i*ty, n. Etym: [F. solidarité, fr. solide. See Solid.]
Definition: An entire union or consolidation of interests and
responsibilities; fellowship; community.
Solidarity [a word which we owe to the French Communists], signifies
a fellowship in gain and loss, in honor and dishonor, in victory and
defeat, a being, so to speak, all in the same boat. Trench.
The solidarity . . . of Breton and Welsh poetry. M. Arnold.
Source: Webster’s Unabridged Dictionary 1913 Edition