As used in this chapter, the following terms shall have the meanings indicated:
§ 43.010, RSMo
RSMo 1939 § 8347, A.L. 1943 p. 652, A.L. 1949 p. 293 and L. 1949 p. 292 § 8348A, A. 1949 H.B. 2164, A.L. 1971 S.B. 163, A.L. 2005 H.B. 353, A.L. 2007 H.B. 405