engagement /engāj″mənt/ [Fr, a bonding] , 1. (in labor) fixation of the fetal head in the maternal midpelvis with the biparietal diameter of the fetal head level with the plane of the ischial spines (i.e., the greatest transverse diameter of the fetal head has negotiated the pelvic inlet). 2. (in occupational therapy) active participation in activities, occupations, and daily living. The goal of occupational therapy services is to enable persons to engage in desired occupations.