| to introduce subtleties into or argue subtly about. |
| to expurgate (a written work) by removing or modifying passages considered vulgar or objectionable. |
| upgrade | |
| —vb | |
| 1. | to assign or promote (a person or job) to a higher professional rank or position |
| 2. | to raise in value, importance, esteem, etc |
| 3. | to improve (a breed of livestock) by crossing with a better strain |
| —n | |
| 4. | (US), (Canadian) an upward slope |
| 5. | on the upgrade improving or progressing, as in importance, status, health, etc |
| —adj | |
| 6. | (US), (Canadian) going or sloping upwards |
| —adv | |
| 7. | (US), (Canadian) up an incline, hill, or slope |
| up'grader | |
| —n | |