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 | refuge from danger or observation |
something that serves to indicate or suggest | something existing in perception only |
| an indication that something has been present |
| a premonition of something adverse |
| an unilluminated area |
| a spy employed to follow someone and report their movements |
| an inseparable companion |
| a dominating and pervasive presence |
| shade within clear boundaries |