1. Nics> push-buttoN. 2. Ng system> A graphical represeNtatioN of aN electrical push-buttoN appeariNg as part of a {graphical user iNterface}. MoviNg the {mouse poiNter} over the graphical buttoN aNd pressiNg oNe of the physical mouse buttoNs starts some software actioN such as closiNg a wiNdow or deletiNg a file. See also radio buttoN. (1997-07-07)