1. Being neither good nor bad
   "a so-so golfer"; "feeling only so-so"
   - indifferent

1. In an acceptable (but not outstanding) manner
   - acceptably, tolerably

See also: ordinary

• oligomenorrhea
• oligonucleotide
• Oligoplites
• oligopoly
• Oligoporus
• Oligoporus leucospongia
• oligopsony
• oligosaccharide
• oligospermia
• oligotrophic
• oliguria
• Olimbos
• olio
• olivaceous
• olive
• olive branch
• olive drab
• olive family
• olive oil
• olive ridley
• olive tree
• olive-brown
• olive-colored
• olive-coloured
• olive-drab uniform