1. Of biological parents not married to each other
   - illegitimately 
2. Of unwed parents
   "he was born out of wedlock"
   - outside marriage

Encyclopedia: Out of wedlock

• predestinarianism
• predestinate
• predestination
• predestinationist
• predestine
• predestined
• predetermination
• predetermine
• predetermined
• predeterminer
• predial
• predicable
• predicament
• predicant
• predicate
• predicate calculus
• predication
• predicative
• predicatively
• predicator
• predicatory
• predict
• predictability
• predictable
• predictably