What does concavely mean?
Concavely is an adverb describing something that curves inward, forming a hollow or depression — the opposite of convexly, which describes an outward-bulging curve. It derives from the Latin concavus ('hollowed out'), built from cavus ('hollow'), the same root behind 'cave', 'cavity', and 'excavate'. The word appears almost exclusively in technical and descriptive contexts: geometry, optics, engineering, anatomy, and art criticism. A satellite dish is shaped concavely so it can gather signals at one point; a valley slopes concavely on either side of its floor; a sculptor may carve a surface concavely to create shadow and depth. Because it is precise but uncommon, concavely lends writing a measured, expert tone, though in casual speech most people simply say something 'curves inward'. Knowing the concave–convex pair is genuinely useful for reading scientific and technical prose with confidence.
adverbIn a manner that curves inward, forming a hollow or depression; shaped like the inside of a curve rather than bulging outward.
- In an inwardly curved manner; with a hollow, scooped-out shape (the opposite of convexly).
"The lens was ground concavely so that it would spread light outward."
"The sculptor chiseled the marble concavely, letting the surface fall away into a smooth hollow."
"The satellite dish curves concavely so that incoming signals are reflected toward a single focal point."
Your car's side mirror is marked 'objects may be closer than they appear' because it's curved concavely — a shape that has been tricking drivers' eyes since mirrors were first ground by hand.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of concavely
Concavely comes from the adjective 'concave', which English borrowed in the late 14th century from Latin concavus, meaning 'hollowed out' or 'arched inward'. The Latin term itself combines cum- ('together') with cavus ('hollow'), the same root that gives us 'cave', 'cavity', and 'excavate'. The adverbial form arose through the standard addition of '-ly' to the adjective.
Related word forms
How concavely is actually used
A technical, formal word used chiefly in geometry, optics, engineering, and descriptions of physical form; rare in everyday speech, where speakers usually say 'curves inward' or 'is hollow-shaped'. It is almost always paired with verbs of shaping or curving.
Easily confused with concavely
Convexly means curving or bulging outward like the outside of a circle, while concavely means curving inward to form a hollow.