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).

Big Ten CB Rankings 2023: Kalen King Crowned the top Cornerback in the Conference

Harry Maguire is still Englands BEST CB” & Tuchel Sacking a “disgrace” - The Ringer

Football Cornerback

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

Buffalo Bills select Oregon State CB Alex Austin with final 7th round pick in 2023 NFL Draft

Abbreviations used to refer to football positions.

10 things to know about Cowboys CB Trevon Diggs, including his own barbecue sauce

New Arizona CB coach John Richardson relishing return to college field after flag football detour - Arizona Desert Swarm

WR/Cornerback Matchups: Conference Championship Fantasy Football Sleepers (2023)

CB - What is a CB in football?

Purdue football recruiting: Franklin Central CB Hudauri Hines commits

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

Next Gen Stats' top 10 coverage players of 2021: Cowboys CB on the board but it's not Trevon Diggs

Texas CB X'Avion Brice enters the NCAA transfer portal - Burnt Orange Nation

SEC Football: 4 possible destinations for Jackson State CB Travis Hunter