| a chattering or flighty, light-headed person. |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| ACLU | |
| —abbreviation for | |
| American Civil Liberties Union | |
An organization founded in 1920 in the wake of the red scare to defend civil liberties. The ACLU has often defended the rights of individuals aligned with unpopular causes, including American communists and Nazis.
| ACLU American Civil Liberties Union |