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

• fashion arbiter
• fashion business
• fashion consultant
• fashion designer
• value-added tax
• value-system
• valued
• valueless
• valuelessness
• valuer
• values
• valvate
• valve
• valve rocker
• valve-in-head engine
• valved
• valvelet
• valvotomy
• valvula
• valvular
• valvular heart disease
• valvular incompetence
• valvule
• valvulitis
• valvulotomy