Definitions of labor:

• noun:   productive work (especially physical work done for wages)

  Example: "His labor did not require a great deal of skill"

• noun:   a social class comprising those who do manual labor or work for wages

  Example: "There is a shortage of skilled labor in this field"

• noun:   concluding state of pregnancy; from the onset of labor to the birth of a child

  Example: "She was in labor for six hours"

• noun:   the federal department responsible for promoting the working conditions of wage earners in the United States; created in 1913
• noun:   an organized attempt by workers to improve their status by united action especially via labor unions (especially the leaders of this movement)
• noun:   any piece of work that is undertaken or attempted
• noun:   a political party formed in Great Britain in 1900; characterized by the promotion of labor's interests and the socialization of key industries
• verb:   work hard
• verb:   undergo the efforts of childbirth
• verb:   strive and make an effort to reach a goal
• name:  A surname (very rare: popularity rank in the U.S.: #30127)