stur·dy / ˈstərdē/ • adj. (-di·er , -di·est ) (of a person or their body) strongly and solidly built: he had a sturdy, muscular physique. ∎ strong enough to withstand rough work or treatment: the bike is sturdy enough to cope with bumpy tracks. ∎ showing confidence and determination: the townspeople have a sturdy independence. • n. vertigo in sheep caused by a tapeworm larva encysted in the brain. DERIVATIVES: stur·died adj. (from the noun) stur·di·ly / -dl-ē/ adv. stur·di·ness n.