What are interceptions?

Some articles on interceptions:

Tom Curtis (American Football) - University of Michigan
... On November 11, 1967, Curtis had three interceptions against Illinois, which remains tied for Michigan's single game record ... During the 1967 season (his first as a defensive back), Curtis totaled seven interceptions to tie the Big Ten Conference record ... He totaled 10 interceptions in 1968, a mark that remains Michigan's single season record ...
Alphonso Smith - College Career
... Smith started all 11 games and finished the season with 60 tackles (52 unassisted), three interceptions, two sacks, 12 pass breakups and one forced fumble ... In 2006, the sophomore played 14 games with three starts, registering 48 tackles (37 solo), three interceptions, four sacks, 11 pass breakups and one forced fumble ... all 13 games as a junior for the demon Deacons and had 44 tackles (36 solo), eight interceptions, three sacks, 18 pass breakups and four forced ...
Lloyd Harrison - College Career
... starter at cornerback and finished his collegiate career with 190 tackles (nine for loss), 12 interceptions, 40 passes defensed, one sack, two fumble ... - Associated Press (3rd), CBS Sportsline (2nd) Lloyd Harrison led the ACC in interceptions and passes broken up as a junior in 1998, tallying seven picks and 23 PBUs ... Finished his career ranked third in school history with 12 interceptions, third in passes broken up with 40 ...
List Of Canadian Football League Records (individual) - Interceptions
... Most Interceptions, career Less Browne 87 Barron Miles 66 Larry Highbaugh 66 Terry Irvin 62 Don Wilson 61 Garney Henley 59 Most Interceptions, one season Al Brenner (1972) 15 Less Browne (1990) 14 Roy ...