CB - What is a CB in football?

CB has 2 meanings. The most common is "Cornerback." See examples of how people use the terms.
In football, a CB is a cornerback, which is a defensive back (DB) that typically guards a wide receiver. The CB's primary job is to defend receivers, which are typically wide receivers (WR), tight ends (TE), and running backs (RBs).

49ers promote CB Tre Swilling to roster, release CB Anthony Brown

CB South football impresses in SOL tilt

Bengals take CB DJ Turner in second round of NFL draft - Sent-trib

CB West star McFadden suffers season-ending knee injury

Ex-UNC football star Dre Bly out as Tar Heels' CB coach - ESPN

Top 10 2022 NFL Draft Cornerbacks From Ryan McCrystal

2023 NFL Draft: Cornerback Cameron Mitchell, Northwestern, No. 142

Central Bucks East Football Parents Club

Why did Bengals make deferred claim for former Chiefs CB Chris Lammons?

Kansas State Wildcats transfer CB Will Lee commits to Texas A&M Aggies - Good Bull Hunting

B/R Football on X: A debut for Chelsea's new CB 🔵 / X

Notre Dame CB Cam Hart Focused on Interceptions Over NFL Decision

Badgers CB enters the transfer portal - Bucky's 5th Quarter

Lions waiving recent seventh-round CB pick despite strong end to preseason

NFL Week 14 winners and losers: New York Jets CB Sauce Gardner shuts down Buffalo's Stefon Diggs, NFL News, Rankings and Statistics