a. Slipping back; falling back into sin or error; sinning. [ 1913 Webster ]
Turn, O backsliding children, saith the Lord. Jer. iii. 14. [ 1913 Webster ]
n. The act of one who backslides; abandonment of faith or duty. [ 1913 Webster ]
Our backslidings are many. Jer. xiv. 7. [ 1913 Webster ]