Definition. Since the publication of the History of Trade Unionism (1894) by Sidney and Beatrice Webb, the predominant historical view is that a trade union "is a continuous association of wage earners for the purpose of maintaining or improving the conditions of their employment."
The journey in journeyman refers to a sense of the familiar word not often used anymore: "a day's labor." This sense of journey was first used in the 14th century. When journeyman appeared the following century, it originally referred to a person who, having learned a handicraft or trade through an apprenticeship, worked for daily wages.