1. Existing by nature and without artificial aid
   "one of the 93 naturally occurring chemical elements"

See also: present

• groundcover
• grounder
• groundfish
• groundhog
• Groundhog Day
• grounding
• groundkeeper
• groundless
• groundlessly
• groundlessness
• groundling
• groundmass
• groundnut
• groundnut oil
• groundnut vine
• grounds
• groundsel
• groundsel bush
• groundsel tree
• groundsheet
• groundskeeper
• groundsman
• groundspeed
• groundwater level
• groundwork