Definitions
1.nounA pointer or index that indicates something.
2.nounA meter or gauge.
3.nounThe needle or dial on such a meter.
4.nounAny of many substances, such as litmus, used to indicate the concentration of a substance, or the degree of a reaction.
5.nounA plant or animal whose presence is indicative of some specific environment.
6.nounA measure, such as unemployment rate, which can be used to predict economic trends.
7.nounA turn signal; each of the flashing lights on each side of a vehicle which indicate a turn is being made to left or right, or a lane change etc.
8.nounA bird, the honeyguide.