Infirm/ɪnˈfɜːrm/ Definition 1 of 3Pro Tip 1/3Age Specific Often used for elderly people, highlighting their vulnerable physical condition. The charity focuses on help for the old and infirm. Pro Tip 2/3Health Context Commonly appears in health and medical discussions to describe poor condition. She has been infirm since her stroke last year. Pro Tip 3/3Compassion Tone Using 'infirm' shows sensitivity towards people with health issues. Community services provide meals for the infirm in our neighborhood.