China is highly secretive about its nuclear research programs, and information appears in the news only occasionally.

Although the work of the court is highly secretive, the authorities disclosed its use in two recent arrests.

The highly secretive satellite-tracking station has been listening in to the world since 1966.

No problem, he said, unless his highly secretive Chinese partners objected.

It is highly secretive as most of its personnel are known only to the high-ranking government and military officials.

The central bank is highly secretive about its holdings.

From its start in 1991, Fimaco's operations have been highly secretive.

The program remained highly secretive for several years after its operational activities activated since 1979.

Before 1771, the British Parliament had long been a highly secretive body.

These facts were once kept highly secretive but are now a widely accepted open secret.