1. Indication ----->>> Something that serves to indicate or something that is indicated as advisable or necessary. 2. A space of time between events or states or A space between objects, units, points, or states or the difference in pitch between two tones or a set of real numbers between two numbers either including or excluding one or both of them Solution 1. Indication ----->>> Something that serves to indicate or something that is indicated as advisable or necessary. 2. A space of time between events or states or A space between objects, units, points, or states or the difference in pitch between two tones or a set of real numbers between two numbers either including or excluding one or both of them.