noun
air mass
Meteorological term for a large body of air with uniform temperature and humidity.
寒気団が南下して気温が下がった。
A cold air mass moved south, causing temperatures to drop.
noun
Slangy, jocular pun on 既男 (きだん, 'already a man'), using the same reading as the meteorological term. Not a standard word; used humorously to refer to a married man.
See also: 既男 (きだん)
彼もついに気団の仲間入りか。
So he's finally joined the ranks of the married men, huh?