Added 9 October 2026 undersize adjective Categories: Describing WordsRare Words adjective ! Definition from WordNet 3.1, Princeton University. More about undersize at Wordnik → Where our words come from → Smaller than normal for its kind. Related Words: smalllittleundersizedsubnormalunsizedundersparredundergrownunderaverageunsmallunsizeableunbigundermuscled Back to today's word