From BiblePortal Wikipedia

Webster's Dictionary [1]

(n.) Manner of behaving, whether good or bad; mode of conducting one's self; conduct; deportment; carriage; - used also of inanimate objects; as, the behavior of a ship in a storm; the behavior of the magnetic needle.

International Standard Bible Encyclopedia [2]

bē̇ - hāv´yẽr ( טעם , ṭa‛am , "taste," "flavor," hence, "intellectual taste," i.e. judgment, reason, understanding): Of significance as referring to David's feigning madness before Aehish, king of Gath, being "sore afraid." Gesenius renders it "changed his understanding," i.e. his mental behavior and outward manner ( 1 Samuel 21:13 , and title to Ps 34).

Twice used in the New Testament (the King James Version) of the well-ordered life of the Christian (κόσμιος , kósmios , "well-arranged," "modest," i.e. living with decorum:  1 Timothy 3:2 ), defining the blameless life expected of a minister (overseer), "A bishop must be.... of good behavior," the Revised Version (British and American) "orderly" (κατάστημα , katástēma , "demeanor," "deportment"), including, according to Dean Alford, "gesture and habit" as the outward expression of a reverent spirit ( 1 Peter 3:1 ,  1 Peter 3:2 ). "Aged women ... in behavior as becometh holiness" ( Titus 2:3; the Revised Version (British and American) "reverent in demeanor").