Weight

Weight

In science and engineering, the weight of an object is the force on the object due to gravity. Its magnitude , often denoted by an italic letter W, is the product of the mass m of the object and the magnitude of the local gravitational acceleration g; thus:...

is a measurement of the gravitational force acting on an object. In non-scientific contexts it may refer to an object's mass

Mass

Mass can be defined as a quantitive measure of the resistance an object has to change in its velocity.In physics, mass commonly refers to any of the following three properties of matter, which have been shown experimentally to be equivalent:...

(quantity of matter). Figuratively, it refers to the seriousness or depth of an idea or thought, or the danger and urgency of a situation.

Weight may also refer to:

Science and technology

• Specific weight
  Specific weight
  The specific weight is the weight per unit volume of a material. The symbol of specific weight is γ ....
  
  , the weight per unit volume of a material
• A measure of paper density
• Line weight in contour line construction in cartography
• Body weight
  Body weight
  The term body weight is used in daily English speech as well as in the contexts of biological and medical sciences to describe the mass of an organism's body. Body weight is measured in kilograms throughout the world, although in some countries it is still measured in pounds or stones and pounds...
  
   The weight of a person.

Mathematics

• Weighting
  Weighting
  The process of weighting involves emphasizing the contribution of some aspects of a phenomenon to a final effect or result — giving them 'more weight' in the analysis. That is, rather than each variable in the data contributing equally to the final result, some data are adjusted to contribute...
  
  , making some data contribute to a result more than others
  • Weighted mean
    Weighted mean
    The weighted mean is similar to an arithmetic mean , where instead of each of the data points contributing equally to the final average, some data points contribute more than others...
    
    
  • Weight function
    Weight function
    A weight function is a mathematical device used when performing a sum, integral, or average in order to give some elements more "weight" or influence on the result than other elements in the same set. They occur frequently in statistics and analysis, and are closely related to the concept of a...
    
    
  • Weighting filter
    Weighting filter
    A weighting filter is used to emphasise or suppress some aspects of a phenomenon compared to others, for measurement or other purposes.- Audio applications :...
    
    
• Weight (representation theory)
  Weight (representation theory)
  In the mathematical field of representation theory, a weight of an algebra A over a field F is an algebra homomorphism from A to F – a linear functional – or equivalently, a one dimensional representation of A over F. It is the algebra analogue of a multiplicative character of a group...
  
  , a type of function
• Weight of a topological space, see base (topology)
  Base (topology)
  In mathematics, a base B for a topological space X with topology T is a collection of open sets in T such that every open set in T can be written as a union of elements of B. We say that the base generates the topology T...
  
  
• Weighted mean
  Weighted mean
  The weighted mean is similar to an arithmetic mean , where instead of each of the data points contributing equally to the final average, some data points contribute more than others...
  
   and weighted average, the importance can vary on each piece of data
• Weight (strings)
  Weight (strings)
  The a-weight of a string, for a a letter, is the number of times that letter occurs in the string. More precisely, let A be a finite set , a\in A a letter of A, and c\in A^* a...
  
  , the number of times a letter occurs in a string

Sports

• Weight class, a competition division used to match competitors against others of their own size
• Weights, objects of known mass used in weightlifting
• The object thrown in a weight throw
  Weight throw
  The weight throw is a track and field event that is held at Scottish Highland games and occasionally at indoor track meets.In the Highland Games, the weight throw consists of two separate events, the light weight and the heavy weight. In both cases, the implement consists of a steel or lead weight ...
  
  
• Draw weight of a bow
  Bow (weapon)
  The bow and arrow is a projectile weapon system that predates recorded history and is common to most cultures.-Description:A bow is a flexible arc that shoots aerodynamic projectiles by means of elastic energy. Essentially, the bow is a form of spring powered by a string or cord...
  
  

Biology and physiology

• Body weight
  Body weight
  The term body weight is used in daily English speech as well as in the contexts of biological and medical sciences to describe the mass of an organism's body. Body weight is measured in kilograms throughout the world, although in some countries it is still measured in pounds or stones and pounds...
  
  , a commonly used term for the mass of an organism's body

Television, film, and music

• Weight (album)
  Weight (album)
  Weight is the fourth full-length studio album by the Rollins Band, released on April 12, 1994 . It featured the band's biggest hits, "Liar" and "Disconnect," which gained rotation on MTV and gained popularity after being featured on Beavis and Butthead...
  
  , an album by Rollins Band
• The Weight
  The Weight
  "The Weight" is a song written by Robbie Robertson. It was released by The Band as Capitol Records single 2269 in 1968, and appeared one week later on the group's debut album Music from Big Pink. The song is listed as #41 on Rolling Stones 500 Greatest Songs of All Time published in 2004, and...
  
  , a 1968 song by The Band
• The pressure a pianist
  Pianist
  A pianist is a musician who plays the piano. A professional pianist can perform solo pieces, play with an ensemble or orchestra, or accompany one or more singers, solo instrumentalists, or other performers.-Choice of genres:...
  
   applies with force to the keyboard, to improve tone
• "Weight", a song by Isis from the album Oceanic
  Oceanic (Isis album)
  Oceanic is the second full-length album by American post-metal band Isis, released on September 16, 2002 by Ipecac Recordings.On July 23, 2006, Isis performed Oceanic in its entirety at KOKO, Camden Town, London as part of the All Tomorrow's Parties curated Don't Look Back series. This performance...