1. The act of umpiring
   - umpirage, officiation, officiating

1. Be a referee or umpire in a sports competition
   - umpire 
2. Evaluate professionally a colleague's work
   - peer review

Type of: critique, deciding, decision making, judge, review

Encyclopedia: Referee

• butcher knife
• butcher paper
• butcher shop
• butcher's broom
• butcherbird
• butchering
• butcherly
• butchery
• Butea
• Butea frondosa
• butea gum
• butea kino
• Butea monosperma
• butene
• Buteo
• Buteo buteo
• Buteo jamaicensis
• Buteo lagopus
• Buteo lineatus
• buteonine
• butler
• butt
• butt against
• butt end
• butt hinge