Hash, hashes, hash mark, or hashing may refer to:

Substances

  • Hash (food), a coarse mixture of ingredients, often based on minced meat
  • Hash (stew), a pork and onion-based gravy found in South Carolina
  • Hash, a nickname for hashish, a cannabis product

Marks and symbols

  • Checkmate symbol in chess
  • Hash mark (sports), a marking on hockey rinks and gridiron football fields
  • Hatch marks, hash marks or tick marks, a form of mathematical notation
  • Number sign (#), also known as the hash, hash mark, or (in American English) pound sign
  • Service stripe, a military and paramilitary decoration
  • Tally mark, a counting notation

Computing

  • Geohash, a spatial data structure which subdivides space into buckets of grid shape
  • hash (Unix), an operating system command
  • Hash chain, a method of producing many one-time keys from a single key or password
  • Hash function, an encoding of data into a small, fixed size; used in hash tables and cryptography
  • Cryptographic hash function, a hash function used to authenticate message integrity
  • Hash table, a data structure using hash functions
  • Hashtag, a form of metadata often used on social networking websites
  • URI fragment, in computer hypertext, a string of characters that refers to a subordinate resource
  • Zobrist hashing, a method of hashing chess positions into a key

Other uses

  • Fossil hash, a rock composed primarily of fragmented fossils
  • Hash (EP) ([#]), a 2020 EP by Loona

See also

  • Hachis parmentier, a name for shepherd's pie
  • Hash browns
  • Hash House (disambiguation)
  • Hashtag (disambiguation)
  • Hatching, graphic procedure and pattern