structure displaying a board on which advertisements can be posted | a device that signals the occurrence of some undesirable event |
a public display of a message | a clock that wakes a sleeper at some preset time |
a gesture that is part of a sign language | an automatic signal (usually a sound) warning of danger |
any nonverbal action or gesture that encodes a message | fear resulting from the awareness of danger |
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 | |