sentient UK /ˈsɛn.ti.ənt/US /ˈsɛn.ʃi.ənt/adjective 3noun 2forms 3 adjective3 •Experiencing sensation, thought, or feeling.Consider fish, who are apparently sentient yet cognitively extremely primitive in comparison with humans.Obviously, other morally relevant considerations would apply to the case of a sentient fetus, as by acquiring sentience it acquires interests and moral status. •Able to consciously perceive through the use of sense faculties. •Possessing human-like awareness and intelligence.Not even a microbe? I don't want to blow up something that could evolve into a sentient species in a couple of billion years. — 2002 noun2 •Lifeform with the capability to feel sensation, such as pain. •An intelligent, self-aware being.The merpeople and the sentients who lived on the beach often hitched rides on these creatures, steering them by pressure on exposed nerve centers. — 1965 formssentients · more sentient · most sentient