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Definition
angled or curving inward- Of what use is genius, if the organ is too convex or too concave and cannot find a focal distance within the actual horizon of human life?Emerson, Ralph Waldo -- Essays, Second Series
- The golf putter has a concave striking surface.
- It uses concave micro-mirrors with programmable focal lengths.
- It terminated in a concave breast of rock, nearly vertical and destitute of vegetation.Bierce, Ambrose -- Present At A Hanging And Other Ghost Stories
- You will perceive, Watson, that the glasses are concave and of unusual strength.Doyle, Sir Arthur Conan -- The Return of Sherlock Holmes
- MC Escher's drawing "Concave and Convex" experiments with perspective and perception.
- Japanese concave cutters are important bonsai tools.
- The great height at which the kite hung made a great concave curve in the string...Stoker, Bram -- The Lair of the White Worm
- It flowed in a gentle concave from the road up the mountain, its farther boundary an unbroken line of timber.London, Jack -- The Valley of the Moon
- A deep depression in the middle, partially filled with water, was ringed by concave slopes that cantilevered dangerously over the water.Orson Scott Card -- Ender's Game
- They are used by Fremen to line concave planting depressions where they provide a small but reliable source of water.Frank Herbert -- Dune
- Fixed to the front of it was something that looked like a fencing mask, with the concave side outwards.George Orwell -- 1984
- His face was odd, concave, forehead and chin jutting.Don DeLillo -- White Noise
- Robert had spindly arms and legs, a soft concave chest and little belly, and eyes that were always red and runny.George R.R. Martin -- A Feast For Crows
- Her senses feasted, between changes, on that lean, concave, Christlike body.Arundhati Roy -- The God of Small Things
- It was a concave rectangle-about four yards by two-like a huge fitted sheet .... the crudest approximation of a parachute imaginable.Dan Brown -- Angels & Demons
- I feel the ropy hardness of his arms, the warmth of his slightly concave chest, as he holds me tight, tighter than anyone has ever held me.Christina Baker Kline -- Orphan Train
- I placed three fingers against his side where the ribcage seemed concave and pressed.Dan Simmons -- Hyperion
- They'll go after anything that's warm and concave.Neal Stephenson -- Snow Crash
- When I raised my arms over my head, my chest became concave.Nicole Krauss -- The History of Love