in•di•ca•tion /ˌɪndɪˈkeɪʃən/ n. something serving to indicate: [countable]: some indications this morning that it would rain. [uncountable] no indication that things would be this bad. The opinion polls proved to be a good indication of the election result. Helen's face gave no indication of what she was thinking. Define indication. indication synonyms, indication pronunciation, indication translation, English dictionary definition of indication. n. 1. The act of indicating: His indication of refusal came in the form of a frown. 2. Something that serves to indicate; a sign: indications of an economic. Synonyms for INDICATION: clue, hint, suggestion, cue, idea, sign, intimation, inkling; Antonyms of INDICATION: solution, answer By surface analysis, indicate +‎ -ion. indication (countable and uncountable, plural indications) An act of pointing out or indicating. There's no indication that the fire was caused by criminals. All the indications point to drink-driving as the cause of the accident. Indication (medicine) In medicine, an indication is a valid reason to use a certain test, medication, procedure, or surgery. [1] There can be multiple indications to use a procedure or medication. [2] An indication can commonly be confused with the term diagnosis. The meaning of INDICATION is something that serves to indicate. How to use indication in a sentence. An indication is like a clue, or a suggestion, but it's not proof. If someone is weaving all over the place when they walk, that could be an indication that they’re drunk. An indication is a sign which suggests, for example, what people are thinking or feeling. All the indications are that we are going to receive reasonable support from abroad. He gave no indication that he was ready to compromise. INDICATION definition: 1. a sign that something exists, is true, or is likely to happen: 2. a suitable action that is…. Learn more.