leave no stone un turned

noun, plural stones for 1–5, 7–19, stone for 6.

  1. the hard substance, formed of mineral matter, of which rocks consist.
  2. a rock or particular piece or kind of rock, as a boulder or piece of agate.
  3. a piece of rock quarried and worked into a specific size and shape for a particular purpose: paving stone; building stone.
  4. a small piece of rock, as a pebble.
  5. precious stone.
  6. Chiefly British. one of various units of weight, especially the British unit equivalent to 14 pounds (6.4 kg).
  7. something resembling a small piece of rock in size, shape, or hardness.
  8. any small, hard seed, as of a date; pit.
  9. Botany. the hard endocarp of a drupe, as of a peach.
  10. Pathology.
    1. a calculous concretion in the body, as in the kidney, gallbladder, or urinary bladder.
    2. a disease arising from such a concretion.
  11. a gravestone or tombstone.
  12. a grindstone.
  13. a millstone.
  14. a hailstone.
  15. Building Trades. any of various artificial materials imitating cut stone or rubble.
  16. Printing. a table with a smooth surface, formerly made of stone, on which page forms are composed.
  17. (in lithography) any surface on which an artist draws or etches a picture or design from which a lithograph is made.
  18. a playing piece in the game of dominoes, checkers, or backgammon.
  19. Usually stones. testes.


  1. made of or pertaining to stone.
  2. made of stoneware: a stone mug or bottle.
  3. stonelike; stony; obdurate: a stone killer; stone strength.


  1. completely; totally (usually used in combination): stone cold.

verb (used with object), stoned, ston·ing.

  1. to throw stones at; drive by pelting with stones.
  2. to put to death by pelting with stones.
  3. to provide, fit, pave, line, face or fortify with stones.
  4. to rub (something) with or on a stone, as to sharpen, polish, or smooth.
  5. to remove stones from, as fruit.
  6. Obsolete. to make insensitive or unfeeling.


  1. cast the first stone, to be the first to condemn or blame a wrongdoer; be hasty in one’s judgment: What right has she to cast the first stone?
  2. leave no stone unturned, to exhaust every possibility in attempting to achieve one’s goal; spare no effort: We will leave no stone unturned in our efforts to find the culprit.


  1. Oliver. born 1946, US film director and screenwriter: his films include Platoon (1986), Born on the Fourth of July (1989), JFK (1991), Nixon (1995), Alexander (2004), and World Trade Center (2006)
  2. Sharon. born 1958, US film actress: her films include Basic Instinct (1991), Casino (1995), and Cold Creek Manor (2003)


  1. the hard compact nonmetallic material of which rocks are madeRelated adjective: lithic
  2. a small lump of rock; pebble
  3. jewellery short for gemstone
    1. a piece of rock designed or shaped for some particular purpose
    2. (in combination)gravestone; millstone
    1. something that resembles a stone
    2. (in combination)hailstone
  4. the woody central part of such fruits as the peach and plum, that contains the seed; endocarp
  5. any similar hard part of a fruit, such as the stony seed of a date
  6. plural stone British a unit of weight, used esp to express human body weight, equal to 14 pounds or 6.350 kilograms
  7. Also called: granite the rounded heavy mass of granite or iron used in the game of curling
  8. pathol a nontechnical name for calculus
  9. printing a table with a very flat iron or stone surface upon which hot-metal pages are composed into formes; imposition table
  10. rare (in certain games) a piece or man
    1. any of various dull grey colours
    2. (as adjective)stone paint
  11. (modifier) relating to or made of stonea stone house
  12. (modifier) made of stonewarea stone jar
  13. cast a stone at cast aspersions upon
  14. heart of stone an obdurate or unemotional nature
  15. leave no stone unturned to do everything possible to achieve an end


  1. (in combination) completelystone-cold; stone-dead

verb (tr)

  1. to throw stones at, esp to kill
  2. to remove the stones from
  3. to furnish or provide with stones
  4. stone the crows British and Australian slang an expression of surprise, dismay, etc

n.Old English stan, used of common rocks, precious gems, concretions in the body, memorial stones, from Proto-Germanic *stainaz (cf. Old Norse steinn, Danish steen, Old High German and German stein, Gothic stains), from PIE *stai- “stone,” also “to thicken, stiffen” (cf. Sanskrit styayate “curdles, becomes hard;” Avestan stay- “heap;” Greek stear “fat, tallow,” stia, stion “pebble;” Old Church Slavonic stena “wall”). Slang sense of “testicle” is from mid-12c. The British measure of weight (usually equal to 14 pounds) is from late 14c., originally a specific stone. Stone’s throw for “a short distance” is attested from 1580s. Stone Age is from 1864. To kill two birds with one stone is first attested 1650s. v.c.1200, “to pelt with stones,” from stone (n.). Related: Stoned; stoning. adj.intensifying adjective, 1935, first recorded in black slang, probably from earlier use in phrases like stone blind (late 14c., literally “blind as a stone”), stone deaf, etc., from stone (n.). Stone cold sober dates from 1937. n.

  1. calculus

  1. Rock, especially when used in construction.
  2. The hard, woody inner layer (the endocarp) of a drupe such as a cherry or peach. Not in scientific use.
  3. See calculus.

In addition to the idioms beginning with stone

  • stone cold
  • stone deaf
  • also see:

  • cast in stone
  • cast the first stone
  • flat (stone) broke
  • heart of stone
  • leave no stone unturned
  • rolling stone gathers no moss
  • run into a stone wall
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