1. Of or being the essential or basic part
   "an elementary need for love and nurturing";
   - elemental, primary, basal
    
2. Easy and not involved or complicated
   "an elementary problem in statistics"; "elementary, my dear Watson";
   - simple, uncomplicated, unproblematic
    
3. Of or pertaining to or characteristic of elementary school or elementary education
   "the elementary grades"; "elementary teachers"

See also: basic, easy

Encyclopedia: Elementary, My Dear Shaggy!