WordWeb Online

1. Cause to vibrate in a definite pattern
   "polarise light waves"
   - polarize
    
2. Cause to concentrate about two conflicting or contrasting positions
   - polarize
    
3. Become polarized in a conflict or contrasting situation
   - polarize

Derived forms: polarised, polarises, polarising

See also: polarisation [Brit]

Type of: alter, change, disunite, divide, modify, part, separate