
1) Basis of a grievance 2) Grounds for legal action
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https://www.crosswordclues.com/clue/gravamen

Gravamen (from Lat. gravare, to weigh down; gravis, heavy), (plural gra·va·mens or gra·vam·i·na), a complaint or grievance, the ground of a legal action, and particularly the more serious part of a charge against an accused person. In legal terms, the essential element of a lawsuit. In English the term is used chiefly in legal submissions and...
Found on
http://en.wikipedia.org/wiki/Gravamen

grievance; grounds of legal complaint
Found on
http://phrontistery.info/g.html

• (a.) The grievance complained of; the substantial cause of the action; also, in general, the ground or essence of a complaint. Bouvier.
Found on
http://thinkexist.com/dictionary/meaning/gravamen/

(n) Gravamen is the fundamental, basic or relevant cause on which a claim or complaint or activity is based or developed. Eg. Gravamen in a motor accident claim is the negligence of the driver. Latin word means 'to weigh down'.
Found on
http://www.encyclo.co.uk/local/21213
Gra·va'men noun ;
plural Latin
Gravamina , English
Gravamens . [ Latin , from
gravare to load, burden, from
gravis heavy, weighty. See
Grave ,
adjective ]
(Law) The grievance complained of; the substantial cause of the...
Found on
http://www.encyclo.co.uk/webster/G/53

The essential element of a lawsuit. For example, the gravamen of a lawsuit involving a car accident might be the careless driving (negligence) of the defendant.
Found on
http://www.nolo.com/dictionary/gravamen-term.html
No exact match found.