having been concealed to make discovery difficult or impossible
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
How to use well-hidden in a sentence
While you're watching the art, thanks to not very well hidden small cameras, it's watching you back.David Datuna Creates Google Glass Art for Art Basel Miami Beach | Debra A. Klein | December 4, 2013 | THE DAILY BEAST
I did not catch those few roses because they were well hidden behind a thicket of thorns.
If there was any nervousness, any tension, it was well hidden.Milan Fashion Week’s Big Finale: Versace and Dolce & Gabbana Wow, While Armani Falls Short | Robin Givhan | February 27, 2012 | THE DAILY BEAST
Lesson: To win the presidency, a candidate needs to have fire in the belly; he just needs to keep it well-hidden.
The new rules for kleptocrats: Keep your Bentley well hidden in the garage in Mayfair.
There was a wide shady path, well hidden by trees, and here, he made his first attempts.The White Shield | Myrtle Reed
He had a delicious sense of being well hidden, and had forgotten everything except the zest of the game.Boyhood in Norway | Hjalmar Hjorth Boyesen
Though they would show up plainly on a green field, they are well hidden among the stones along the edge of the water.On the Seashore | R. Cadwallader Smith
An impressive phenomenon in the sunny afternoon; with Daun expectant of them, and the Czech populations well hidden underground!History of Friedrich II. of Prussia, Vol. XVIII. (of XXI.) | Thomas Carlyle
It is generally well hidden in a tussock of rushes growing in or close to the water of a mere or pond.Birds' Nests, Eggs and Egg-Collecting | Richard Kearton