| 1. | a word or phrase associated with some person or thing; a characteristic expression, typical greeting, or the like. |
| 2. | a word or phrase used proverbially; common saying; proverb. |
| 3. | an object of general reproach, derision, scorn, etc.: His crimes will make him a byword through the ages. |
| 4. | an epithet, often of scorn. |