Noah Webster's Dictionary 1. (superl.) Sharp; having a fine edge or point; as, a keen razor, or a razor with a keen edge. 2. (superl.) Acute of mind; sharp; penetrating; having or expressing mental acuteness; as, a man of keen understanding; a keen look; keen features. 3. (superl.) Bitter; piercing; acrimonious; cutting; stinging; severe; as, keen satire or sarcasm. 4. (superl.) Piercing; penetrating; cutting; sharp; -- applied to cold, wind, etc, ; as, a keen wind; the cold is very keen. 5. (superl.) Eager; vehement; fierce; as, a keen appetite. 6. (v. t.) To sharpen; to make cold. 7. (n.) A prolonged wail for a deceased person. Cf. Coranach. 8. (v. i.) To wail as a keener does.

Multi-Version Concordance Keen (3 Occurrences) Acts 13:7 who was a friend of the Proconsul Sergius Paulus. The Proconsul was a man of keen intelligence. He sent for Barnabas and Saul, and asked to be told God's Message. (WEY) Philippians 1:9 And it is my prayer that your love may be more and more accompanied by clear knowledge and keen perception, for testing things that differ, (WEY) Daniel 5:12 because an excellent spirit, and knowledge, and understanding, interpreting of dreams, and showing of dark sentences, and dissolving of doubts, were found in the same Daniel, whom the king named Belteshazzar. Now let Daniel be called, and he will show the interpretation. (See NIV)