tightlipped
- s inclined to secrecy or reticence about divulging information
- Senate President Therese Murray, a Democrat, has been tightlipped about the bill's chances in that chamber.
- China has long been tightlipped about its military strength and capacity, drawing criticism from other countries wary of the Asian giant's growing power and skyrocketing military .
- Named by the shocked King as New Premier was Maher Pasha's Foreign Minister, tightlipped, businesslike Mahmoud Fahmy El Nokrashy Pasha.