U.S. Justice Department: Does Neighborhood Watch reduce crime? Neighborhood Watch programs became popular in the 1970s and 1980s; by 2000, roughly 40% of the U.S. residential population was covered by such citizen crime-watching programs.
Definition of actuarial. 1  1 : of or relating to actuaries. 2  2 : relating to statistical calculation especially of life expectancy.
actuator - a mechanism that puts something into automatic action. 1  mechanism - device consisting of a piece of machinery; has moving parts that perform some function. 2  positioner, rotary actuator - (computer science) the actuator that moves a read/write head to the proper data track.