1. Of low birth or station
   "baseborn wretches with dirty faces"
   - base [archaic], humble, lowly 
2. [archaic] Illegitimate
   - base [archaic]

See also: illegitimate, lowborn

• urbanize
• urbanized
• urceolate
• urceole
• urchin
• Urd
• Urdu
• urea
• urea-formaldehyde resin
• urease
• Uredinales
• ureide
• uremia
• uremic
• ureter
• ureteritis
• ureterocele
• ureterorenal reflux
• ureterostenosis
• urethane
• urethra
• urethral
• urethral orifice
• urethral sphincter
• granulocytopenia