Definitions:

1. (medicine) a reason to prescribe a drug or perform a procedure noun
   • the presence of bacterial infection was an indication for the use of antibiotics
2. something (as a course of action) that is indicated as expedient or necessary noun
   • there were indications that it was time to leave
3. something that serves to indicate or suggest noun
   • an indication of foul play

Synonyms:

• denotation
• indicant
• reading