The noun occupation has 5 senses (first 4 from tagged texts)
1. (7) occupation, business, job, line of work, line -- (the principal activity in your life that you do to earn money; "he's not in my line of business")
2. (1) occupation, military control -- (the control of a country by military forces of a foreign power)
3. (1) occupation -- (any activity that occupies a person's attention; "he missed the bell in his occupation with the computer game")
4. (1) occupation, occupancy, taking possession, moving in -- (the act of occupying or taking possession of a building; "occupation of a building without a certificate of occupancy is illegal")
5. occupation -- (the period of time during which a place or position or nation is occupied; "during the German occupation of Paris")