A signature is a mark used to confirm a person's identity or intent.

Signature may also refer to:

Businesses and organizations Signature (charity), for deaf communication activities in the UK Signature, a clothing brand of Levi Strauss & Co. Signature (dance group) English Bhangra dance duo Suleman Mirza and Madhu Singh Signature (typography journal), a 20th-century British journal Signature (whisky), an Indian whisky brand Signature Books, a publisher of Mormon works Signature Flight Support, a British fixed-base operator Signatures (restaurant), former restaurant once owned by Washington lobbyist Jack Abramoff Signature School, a charter school in Evansville, Indiana Signature Team, a French motor racing team Signature Theatres, a movie theatre chain

Computing Signature block, text automatically appended at the bottom of electronic messages Electronic signature, a digital form of identity or intent validation File signature, data used to identify or verify the contents of a file Type signature, a definition of the inputs and outputs for a function or method XML Signature, a W3C recommendation

Cryptography Blind signature, a digital signature used to validate a disguised message Digital signature (or public-key digital signature), a method for authenticating information Key signature (cryptography), the result of applying a hash function on a key

Mathematics Signature (logic), a description of a set of function and relation symbols in mathematical logic Signature (permutation), a measure for the number of pairs a permutation maps out of order Signature (quadratic form), the number of positive, negative, or null terms of a quadratic form Signature (topology) of a 4k-dimensional compact oriented manifold Signature of a knot, in knot theory Prime signature, the multiset of exponents in the prime factorisation of a number Signature (matrix), the difference of the positive and negative eigenvalues of a matrix Metric signature of the metric tensor on a pseudo-Riemannian manifold

Music Key signature, symbols placed on the staff designating notes to be played sharp or flat Signature (Moya Brennan album), 2006 Signature (Joe album), 2009 Signature (Patrice Rushen album), 1997 Signature, a 2021 EP by the Filipino singer Morissette Signature Records, a mid-20th century United States-based record label Time signature, indicating how many beats are in each measure

Science Acoustic signature, a combination of acoustic emissions Isotopic signature, a characteristic set of ratios of stable or unstable isotopes Metric signature, in physics, the form of a metric tensor: the sign of the diagonal components Signature change, in relativity Radar cross-section Spectral signature, the specific combination of varying wavelengths reflected and absorbed which can uniquely identify an object

Bookbinding Signature (bookbinding), a group of sheets folded in half Signature mark, a mark at the bottom of a group of sheets to assist in collation An alternative word for section (bookbinding)

Other uses Signature Bridge, over the Yamuna river, Delhi, India Signature crime, a crime which exhibits characteristics unique to an offender's psychology Signature Place, a residential skyscraper in St. Petersburg, Florida

See also Cignature, a South Korean girl group Signature file, any of several types of computer files Digital Signature Algorithm, a United States Federal Government standard ElGamal signature scheme Signature song, the song or songs a performer is most identified with Signatory (disambiguation) Doctrine of signatures, the notion that the appearance of plants is a function of their celestial influences Seal (East Asia), stamps used for identity or validation