| 1. | Cards. a card having its value decided by the wishes of the players. |
| 2. | a determining or important person or thing whose qualities are unknown, indeterminate, or unpredictable: In a sailboat race the weather is the wild card. |
| 3. | Tennis. a player, usually without ranking, who is allowed to enter a tournament at the discretion of the tournament committee after regularly qualifying competitors have been selected. |
[wahyld-kahrd] 
| 1. | of, constituting, or including a wild card. |
| 2. | Informal. of, being, or including an unpredictable or unproven element, person, item, etc. |
| 3. | Sports. of, being, or including an unseeded or unproven participant or team, as a team in a championship tournament that has not placed first in its league or area. |