a device for showing the operating condition of some system | structure displaying a board on which advertisements can be posted |
a number or ratio (a value on a scale of measurement) derived from a series of observed facts; can reveal relative changes as a function of time | a public display of a message |
a signal for attracting attention | a gesture that is part of a sign language |
(chemistry) a substance that changes color to indicate the presence of some ion or substance; can be used to indicate the completion of a chemical reaction or (in medicine) to test for a particular reaction | any nonverbal action or gesture that encodes a message |
| a character indicating a relation between quantities |
| a perceptible indication of something not immediately apparent (as a visible clue that something has happened) |
| a fundamental linguistic unit linking a signifier to that which is signified |
| an event that is experienced as indicating important things to come |
| (astrology) one of 12 equal areas into which the zodiac is divided |
| having an indicated pole (as the distinction between positive and negative electric charges) |
| (medicine) any objective evidence of the presence of a disorder or disease |