WordWeb Online

1. Creating a favourable impression
   "strong and vigorous and of prepossessing appearance"

1. Possess beforehand
    
2. Cause to be preoccupied
   "The idea of his failure prepossesses him"
    
3. Make a positive impression (on someone) beforehand
   "A prepossessing appearance"
    
4. Influence (somebody's) opinion in advance
   - prejudice

See also: attractive, prepossession

Type of: act upon, have, impress, influence, own, possess, preoccupy, work