WordWeb Online

1. Act in disregard of laws, rules, contracts, or promises
   "transgress all laws of humanity";
   - offend, infract, violate, go against, breach, break
    
2. Spread over land, especially along a subsiding shoreline
   "The sea transgresses along the West coast of the island"
    
3. Commit a sin; violate a law of God or a moral law
   - sin, trespass
    
4. Pass beyond (limits or boundaries)
   - trespass, overstep

Derived forms: transgressed, transgresses, transgressing

Type of: disrespect, overspread, pass, spread

Antonym: observe