Concise Bible Dictionary:

This word is not used in scripture in the sense of familiar discourse. It occurs in the Old Testament in Psalm 37:1414The wicked have drawn out the sword, and have bent their bow, to cast down the poor and needy, and to slay such as be of upright conversation. (Psalm 37:14) and Psalm 50:2323Whoso offereth praise glorifieth me: and to him that ordereth his conversation aright will I show the salvation of God. (Psalm 50:23), and refers to the walk; it reads in the margin “the upright of way,” that “disposeth his way.” In the New Testament the word ἀναστροθή has a similar sense of “walk, conduct, behavior” (Gal. 1:1313For ye have heard of my conversation in time past in the Jews' religion, how that beyond measure I persecuted the church of God, and wasted it: (Galatians 1:13); Eph. 4:2222That ye put off concerning the former conversation the old man, which is corrupt according to the deceitful lusts; (Ephesians 4:22); 1 Tim. 4:1212Let no man despise thy youth; but be thou an example of the believers, in word, in conversation, in charity, in spirit, in faith, in purity. (1 Timothy 4:12)); and in all other passages except Philippians 1:2727Only let your conversation be as it becometh the gospel of Christ: that whether I come and see you, or else be absent, I may hear of your affairs, that ye stand fast in one spirit, with one mind striving together for the faith of the gospel; (Philippians 1:27); and Philippians 3:2020For our conversation is in heaven; from whence also we look for the Saviour, the Lord Jesus Christ: (Philippians 3:20) (where it is πολίτευμα, “citizenship” which for the Christian is in heaven, separating him from citizenship on earth and its politics); and Hebrews 13:55Let your conversation be without covetousness; and be content with such things as ye have: for he hath said, I will never leave thee, nor forsake thee. (Hebrews 13:5), τρόπος, “general manner of life.”