Modus

noun
  1. A particular way or method of doing something; a mode or manner. noun
    The modus operandi of the criminal was to break in through the back door.
    Her modus of teaching involves a lot of interactive activities.
  2. In legal terms, a provision or condition attached to a grant or agreement. noun
    The contract included a modus that required the tenant to maintain the garden.
    The modus in the will specified that the heir must live in the house for at least five years.