well-informed

[ wel-in-fawrmd ]

/ ˈwɛl ɪnˈfɔrmd /

having extensive knowledge, as in one particular subject or in a variety of subjects.

Origin of well-informed

late Middle English word dating back to 1400–50

That we have enough information to put together a well-informed opinion in every controversy.

Who Gets To Talk About Israel? |Emily L. Hauser |December 7, 2012 |DAILY BEAST
Even rational, well-informed people seem to find evidence of a decline in violence hard to believe.

Despite Viral Attack Video, British Crime Rates Are Down |Peter Jukes |November 25, 2012 |DAILY BEAST
He must present himself as a well-informed CEO rather than a managerial Chief Financial Officer.

Brett O’Donnell’s Guide to Tonight’s Veep Debate |Brett O’Donnell |October 11, 2012 |DAILY BEAST
A well-informed Jewish politico notes that key AIPAC donors were “really exercised.”

The Real Jerusalem Platform Fight |Peter Beinart |September 14, 2012 |DAILY BEAST

A breakthrough came the following year when Davies was contacted by a “good and well-informed person.”

The Man Who Busted Murdoch |William Underhill |July 17, 2011 |DAILY BEAST
George thought the Prince very clever and well-informed at Windsor; and his character always comes out honest.

Miss Eden's Letters |Emily Eden
Well-informed in all things, the Devil must have known that my friend would gain nothing by his visit to futurity.

Seven Men |Max Beerbohm
Well-informed and intelligent spectres, of course (unless they had some private end in view), steer clear of inns altogether.

Old Country Inns of England |Henry P. Maskell
But that sarcastic and well-informed young gentleman is hardly heard in the laughing commotion.

Donald and Dorothy |Mary Mapes Dodge
"Rising five pounds every year," said the well-informed Amelia.

The Small House at Allington |Anthony Trollope

well-informed

having knowledge about a great variety of subjects he seems to be a well-informed person

possessing reliable information on a particular subject