This study aims to investigate to what extent Swedish upper secondary school learners of L2 English understand the meanings of polysemous words and whether puns can be used to teach such words. A test and two questionnaires were constructed to retrieve data from both students and teachers. The results of the study show that Swedish upper secondary school learners of L2 English generally have an acceptable knowledge of polysemous words, but that the students’ comprehension depends on the program they attend. Based on these results, it was also concluded that puns can be used to teach students about the meanings of polysemous words. The results of the questionnaires display that students in general have a positive attitude towards using puns in the classroom, and that they find them entertaining and humorous. In addition, the students also saw this approach as beneficial to their motivation and retention. Lastly, the teachers expressed that using humor can strengthen the learning process, and if the students find the teaching situation enjoyable, they learn faster, and their retention is thus increased. © 2022 IJLS; Printed in the USA by Lulu Press Inc.