to stop providing funds, esp. government funds, for (a program, group, etc.)
See defund in American Heritage Dictionary 4
(dē-fŭndˈ)
transitive verbde·fund·ed, de·fund·ing, de·funds
To stop the flow of funds to: “Some days, they wake up with a burning desire to defund the Public Broadcasting System and the National Endowment for the Arts”(Joe Conason).