soi

/S OY1/
noun
  1. 1

    In Thailand, a side-street branching off a major street; an alley or lane.

  2. 2

    Initialism of sphere of influence. [(politics) A spatial region over which a state has a level of cultural, economic, military or political exclusivity.]

  3. 3

    (semiconductor industry) Initialism of silicon on insulator.