Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary


noun \ˈwāt\

Simple Definition of weight

  • : a measurement that indicates how heavy a person or thing is

  • : the amount that a person or thing weighs : the heaviness of a person or thing

  • : a heavy object that is lifted during exercising

Source: Merriam-Webster's Learner's Dictionary

Full Definition of weight

  1. 1 a :  the amount that a thing weighs b (1) :  the standard or established amount that a thing should weigh (2) :  one of the classes into which contestants in a sports event are divided according to body weight (3) :  poundage required to be carried by a horse in a handicap race

  2. 2 a :  a quantity or thing weighing a fixed and usually specified amount b :  a heavy object (as a metal ball) thrown, put, or lifted as an athletic exercise or contest

  3. 3 a :  a unit of weight or mass — see metric system table b :  a piece of material (as metal) of known specified weight for use in weighing articles c :  a system of related units of weight

  4. 4 a :  something heavy :  load b :  a heavy object to hold or press something down or to counterbalance

  5. 5 a :  burden, pressure <the weight of their responsibilities> b :  the quality or state of being ponderous c :  corpulence

  6. 6 a :  relative heaviness :  mass b :  the force with which a body is attracted toward the earth or a celestial body by gravitation and which is equal to the product of the mass and the local gravitational acceleration

  7. 7 a :  the relative importance or authority accorded something <the weight of her opinions> b :  measurable influence especially on others <throwing his weight behind the proposal>

  8. 8 :  overpowering force

  9. 9 :  the quality (as lightness) that makes a fabric or garment suitable for a particular use or season —often used in combination <summer-weight>

  10. 10 :  a numerical coefficient assigned to an item to express its relative importance in a frequency distribution

  11. 11 :  the degree of thickness of the strokes of a type character

Examples of weight in a sentence

  1. Please indicate your height and weight on the form.

  2. Her weight is 105 pounds.

  3. The boat sank under the weight of the cargo.

  4. Those columns have to be strong enough to support the weight of the roof.

  5. He stays in good shape by lifting weights.

  6. I use pie weights to keep the pie crust from bubbling when I bake it.

Origin and Etymology of weight

Middle English wight, weght, from Old English wiht; akin to Old Norse vætt weight, Old English wegan to weigh

First Known Use: before 12th century

Synonym Discussion of weight

importance, consequence, moment, weight, significance mean a quality or aspect having great worth or significance. importance implies a value judgment of the superior worth or influence of something or someone <a region with no cities of importance>. consequence generally implies importance because of probable or possible effects <the style you choose is of little consequence>. moment implies conspicuous or self-evident consequence <a decision of great moment>. weight implies a judgment of the immediate relative importance of something <the argument carried no weight with the judge>. significance implies a quality or character that should mark a thing as important but that is not self-evident and may or may not be recognized <the treaty's significance>.

influence, authority, prestige, weight, credit mean power exerted over the minds or behavior of others. influence may apply to a force exercised and received consciously or unconsciously <used her influence to get the bill passed>. authority implies the power of winning devotion or allegiance or of compelling acceptance and belief <his opinions lacked authority>. prestige implies the ascendancy given by conspicuous excellence or reputation for superiority <the prestige of the newspaper>. weight implies measurable or decisive influence in determining acts or choices <their wishes obviously carried much weight>. credit suggests influence that arises from the confidence of others <his credit with the press>.

Other Weights and Measures Terms




Simple Definition of weight

  • : to put a weight on (something) to make it heavier or to keep it from moving

Source: Merriam-Webster's Learner's Dictionary

Full Definition of weight

  1. transitive verb
  2. 1 :  to oppress with a burden <weighted down with cares>

  3. 2 a :  to load or make heavy with or as if with a weight b :  to increase in heaviness by adding an ingredient

  4. 3 a :  weigh 1 b :  to feel the weight of :  heft

  5. 4 :  to assign a statistical weight to

  6. 5 :  to cause to incline in a particular direction by manipulation <the tax structure … which was weighted so heavily in favor of the upper classes — A. S. Link>

  7. 6 :  to shift the burden of weight upon <weight the inside ski>

Examples of weight in a sentence

  1. I weighted the fishing line with a lead sinker.

  2. <weighted the car with a ton of furniture and then headed off for college>


First Known Use of weight


WEIGHT Defined for Kids



noun \ˈwāt\

Definition of weight for Students

  1. 1 :  the amount that something weighs <Her weight is 115 pounds.>

  2. 2 :  the force with which a body is pulled toward the earth

  3. 3 :  a unit (as a pound) for measuring weight

  4. 4 :  an object (as a piece of metal) of known weight for balancing a scale in weighing other objects

  5. 5 :  a heavy object used to hold or press down something

  6. 6 :  a heavy object lifted during exercise

  7. 7 :  1burden 2

  8. 8 :  strong influence <The mayor threw his weight behind the proposal.>




Definition of weight for Students



  1. 1 :  to load or make heavy with a weight <I weighted the fishing line so it would sink.>

  2. 2 :  to trouble with a burden <He was weighted down with worry.>

Medical Dictionary


noun \ˈwāt\

Medical Definition of weight

  1. 1:  the amount that a thing weighs

  2. 2:  a unit of weight or mass

Seen and Heard

What made you want to look up weight? Please tell us where you read or heard it (including the quote, if possible).


a very small amount

Get Word of the Day daily email!


Take a 3-minute break and test your skills!


Which is the correct spelling?

accomodate accommodate acommadate acommodate
Name That Thing

Test your visual vocabulary with our 10-question challenge!


Test Your Knowledge - and learn some interesting things along the way.