Noun
(US, basketball) The Sunday in March on which the teams that participate in the NCAA Division I men's basketball tournament are selected.
(US, American football) The Sunday in December on which the college teams that participate in major bowl games are announced.
Source: en.wiktionary.orgThe sight of the ball going into deep space when it gets to Diakite on the block and pounds, pounds, pounds the ball into the floor before firing off a fadeaway will haunt this Virginia team when it awaits its fate on Selection Sunday. Source: Internet
Today was supposed to be one of the happiest days of the year with Selection Sunday, but that has all been destroyed. Source: Internet