to stop providing funds, esp. government funds, for (a program, group, etc.)
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 )
(third-person singular simple present defunds, present participle defunding, simple past and past participle defunded)
From de- + fund.