WordWeb Online

1. Mixed with water
   "a cup of thinned soup";
   - cut, weakened

1. Lose thickness; become thin or thinner
    
2. Make thin or thinner
   "Thin the solution"
    
3. Lessen the strength or flavour of a solution or mixture
   - dilute, thin out, reduce, cut
    
4. Take off weight
   - reduce, melt off, slim, slenderize, slim down, slenderise [Brit], lose weight

See also: dilute, diluted

Type of: bring down, change state, cut, cut back, cut down, reduce, trim, trim back, trim down, turn, weaken

Antonym: thicken

Encyclopedia: Thin, Robert