strictly

Adverb

• restricted to something
  • "we talked strictly business"
• in a stringent manner
• in a rigorous manner

Adv

• In a strict manner.
• In a limited manner; only
• In a narrow or limited sense.
• In a manner that applies to every member of a set or every interval of a function

Examples

• "He adhered strictly to the diet his doctor prescribed."
• "That term refers strictly to smaller birds."

Synonyms

purely, rigorously, stringently