Solicitor and Own Client Costs Definition: One of the most punitive awards of costs, requiring a party to pay the other's legal bill. Also known as solicitor and his client costs.REFERENCES:Duhaime, Lloyd, Legal Definition of Party and Party CostsDuhaime, Lloyd, Legal Definition of Solicitor and Client CostsDuhaime, Lloyd, The Law of Costs: Justice's BoogeymanMcCarthy v. Calgary Roman Catholic Separate School District No. 1, [1980] 5 W.W.R. 524, 17 C.P.C. 115, 30 A.R. 208 Categories & Topics: Civil Litigation & Evidence Law Dictionary Find you are constantly looking up definitions? Try our search provider (works in most modern browsers) If you find an error or omission in Duhaime's Legal Dictionary, or if you have legal term suggestion, we'd love to hear from you!