1. Restricted to something
   "we talked strictly business"
   - purely 
2. In a stringent manner
   - stringently 
3. In a rigorous manner
   - rigorously

See also: strict

Encyclopedia: Strictly

• fusibility
• fusible
• fusible metal
• fusiform
• fusil
• fusilier
• fusillade
• fusilli
• fusion
• fusion bomb
• fusion cooking
• fusion reactor
• fuss
• fuss-budget
• fussily
• fussiness
• fusspot
• fussy
• fustian
• fustic
• fustigate
• fustigation
• fustily
• fusty
• futhark