Definition of subgroup. 1  1 : a subordinate group whose members usually share some common differential quality. 2  2 : a subset of a mathematical group that is itself a group.
Gayle Sierens. Gayle Sierens (born 1954) is a former broadcast journalist and television news anchor on WFLA-TV. She joined the Tampa NBC affiliate in 1977 as a weekend sports anchor and reporter after working with WFSU in Tallahassee while she was attending Florida State University.
Mark Giangreco. Mark Giangreco (born May 13, 1952) is the sports director and lead sports anchor for WLS-TV in Chicago, Illinois. Giangreco currently anchors the sports segment on ABC7 during the 5pm and 10pm newscasts & is an ESPN Radio contributor.