rule_out
1. [ verb ] make impossible, esp. beforehand
Synonyms: close_out preclude
Related terms: obviate
2. [ verb ] (law) include or exclude by determining judicially or in agreement with rules
Synonyms: rule_in
Related terms: rule
3. [ verb ] dismiss from consideration
Synonyms: eliminate reject
Examples:

"John was ruled out as a possible suspect because he had a strong alibi" "This possibility can be eliminated from our consideration"