griev·ance /'grē-vəns/ n
1: a cause of distress (as an unsatisfactory working condition or unfair labor practice) felt to afford a reason for complaint or dispute; esp: a violation of a collective bargaining agreement usu. by the employer
2: the formal expression of a grievance brought esp. by an employee as the initial step toward resolution through a grievance procedure see also arbitration; grievance arbitration at arbitration, mediation

Merriam-Webster’s Dictionary of Law. . 1996.

I noun affliction, annoyance, burden, cause of sorrow, charge, complaint, criticism, discontent, disservice, foul play, grounds for complaint, hardship, iniquity, iniuria, injury, injustice, objection, oppression, problem, querela, querimonia, reason to complain, trial, trouble, unfairness, vexation, wrong associated concepts: arbitration, exhaustion of contractual remedies, grievance committee II index aggravation (annoyance), complaint, criticism, damage, dissatisfaction, exception (objection), gravamen, impugnation, nuisance, objection, outcry, provocation, trouble, wrong

Burton's Legal Thesaurus. . 2006

A complaint; an allegation that someone has committed some injury or injustice that deserves recompense; in labor law, a complaint about working conditions filed by a worker or a union in order to seek relief.

The Essential Law Dictionary. — Sphinx Publishing, An imprint of Sourcebooks, Inc. . 2008.

n. In labor law, a complaint filed with or by a union to challenge an employer's treatment of one or more union members.

Webster's New World Law Dictionary. . 2000.

In labor law a complaint filed by an employee regarding working conditions to be resolved by procedural machinery provided in the union contract. An injury, injustice, or wrong which gives ground for complaint.

Short Dictionary of (mostly American) Legal Terms and Abbreviations.