longtermist adjective 1noun 1forms 1 adjective1 •Of, pertaining to or supporting longtermism (“an ethical stance which gives priority to improving the long-term future”). noun1 •A believer or follower of longtermism (“an ethical stance which gives priority to improving the long-term future”).Longtermists are in daily conversation with neartermists. It’s a red herring to argue that “abandoning what would most help people on Earth today isn’t exactly ethically sound.” — 2022 formslongtermists