1. A reference to something that is likely to spread and cause an epidemic sickness: There are plaguey fevers, plaguey infections, and many other plaguey things that cause people and other creatures to suffer.
2. Causing irritation or annoyance: Henry was tapping an annoying plaguey rhythm on his glass with his fork.

Aircraft noise is a particularly plaguey irritation for those who live near an airport.

One of the most plaguey insects are mosquitoes.

Some people have to put up with plaguey swarms of pestering gnats.

3. In a disagreeable manner: Shirley went home sweating and complained that the plaguey temperature was too hot today!