define well educated

He was well-educated, but of a surly disposition and insubordinate.
Now all this was known to most well-educated Europeans long before 1914.

a knowledgeable audience
Familiarity information: WELL-EDUCATED used as an adjective is very rare.

The well-educated Egyptian officer, with his natural aptitude for figures, does subordinate regimental routine carefully, and works well when supervised by men of stronger character.
To the Indians he preached through an interpreter, and their interests he boldly and successfully defended by attacking the whites 1 Edwards recognized the abuse of impulses and impressions, opposed itinerant and lay preachers, and defended a well-ordered and well-educated clergy.

References:

http://www.audioenglish.org/dictionary/well-educated.htm
http://sentence.yourdictionary.com/well-educated
http://blogs.glowscotland.org.uk/st/balfronhshealth/health/physical-education/physical-education-the-purpose-of-pe/