What is "m'etier"

M'etier \M['e]`tier"\, n. [F.]

1. Calling; vocation; business; trade.

   Not only is it the business of no one to preach the truth but it is the m['e]tier of many to conceal it.
   --A. R. Colquhoun.

2. the field or activity at which one excels; one's forte.