Kenyan in-school youth ages 13–19 years (N = 1,375) were surveyed before an HIV-prevention intervention was implemented. As part of the survey, students wrote their definitions of the terms "abstinence," "being faithful," and "consistent condom use." These definitions were qualitatively analyzed by determining recurrent themes, developing a codebook, and having two coders code the responses. The entire definition was assigned an overall code of fully comprehended, partly comprehended, did not comprehend, or no response in comparison to the conventional definition of the term. Overall, 48 percent fully comprehended abstinence, 20 percent fully comprehended being faithful, and 7 percent fully comprehended consistent condom use.