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

• Mastigomycotina
• gland
• gland disease
• glanders
• glandulae cervicales uteri
• glandulae sebaceae
• glandular
• glandular cancer
• glandular carcinoma
• glandular disease
• glandular disorder
• glandular fever
• glandular Labrador tea
• glandular plague
• glans
• glans clitoridis
• glans penis
• glare
• Glareola
• glareole
• Glareolidae
• glaring
• glaringly
• glary
• Glaser