WordWeb Online

1. Bearing or marked with a label or tag
   "properly labelled luggage";
   - labeled [US], tagged

1. Assign a label to; designate with a label
    
2. Attach a tag or label to
   "label these bottles";
   - tag, mark
    
3. Officially declare a judgment on someone
   "They labelled him unfit to work here";
   - pronounce, judge
    
4. Distinguish (as a compound or molecule) by introducing a labelled atom
    
5. Distinguish (an element or atom) by using a radioactive isotope or an isotope of unusual mass for tracing through chemical reactions

Type of: adjudge, attach, declare, denominate, designate, differentiate, distinguish, hold, secern [rare], secernate, separate, severalise [Brit], severalize, tell, tell apart

Antonym: unlabeled [US]

Encyclopedia: Label