Union security is a term with many ramifications, all of which stem from the basic right of a union to represent the employees of a business in their collective bargaining with the employer. A union is secure when its right to represent the employees is embodied in a contract between the union and the employer, containing a clause which assures the union a continuing right of representation. Such a contract clause protects the union from challenge by another union, from repudiation by the membership during the life of the contract and from a refusal by the employer to recognize the union as the collective bargaining agent of its employees.
Note, Union Security Under Federal Statutes; a Primer, 1 Clev.-Marshall L. Rev. 65 (1952)