Quick answer: a competition uniform is the fitted, team-specific outfit worn to perform - typically a matching top and skirt or set, made from stretch fabric designed to move with stunts, tumbling and jumps without restriction, and visually distinct from everyday practice wear.
What It's Made Of
Competition uniforms are generally made from stretch performance fabrics, often reinforced at stress points and secured with fitted closures so nothing shifts or comes loose during a stunt, toss or tumbling pass. Many include metallic or sequined detailing designed to stand out under competition lighting.
Why Fit Matters
Because competition uniforms are worn through the most physically demanding parts of a routine, a properly fitted uniform isn't just about appearance - a uniform that's too loose can be a genuine practical issue during stunts, which is why gyms are typically precise about sizing and fitting.
Team Identity
Competition uniforms are almost always designed to match across the whole team, in team colours and often carrying a gym or program's name or logo - reinforcing team identity in the same way a bow or bag might.
How Uniforms Have Changed Over Time
Today's fitted, stretch-fabric competition uniforms are relatively recent in cheerleading's long history - see History of Cheerleading Uniforms for how uniforms evolved from far more modest, everyday-style clothing.
Competition Uniform vs Practice Wear
Competition uniforms are reserved for performances and are generally not worn to everyday training - see Practice Wear for what athletes wear day-to-day instead.
Related Equipment
See Cheer Bows for the accessory typically paired with a competition uniform, and Cheer Shoes for the footwear worn alongside it.