lose weight Definition

weight
noun

1. The heaviness of something; the amount that it weighs.

Thesaurus: heaviness, load, heft (US), burden, mass, density, ponderousness, tonnage, substance.
2. physics.
The gravitational force, measured in newtons, acting on a body. Compare mass¹.
3. Any system of units for measuring and expressing weight.
4. A piece of metal of a standard weight, against which to measure the weight of other objects.
5. A heavy object used to compress, hold down or counterbalance something.

Thesaurus: ballast, counterbalance, counterweight, sinker, anchor, sandbag.
6. A heavy load.
7. athletics.
A heavy object for lifting, throwing or tossing.
8. Weightlifting or weight-training.

Form: weights
9. A standard amount that a boxer, etc should weigh.
10. A mental burden.
11. Strength or significance in terms of amount.
12. The main thrust or force.
13. Influence, authority or credibility.

Thesaurus: importance, influence, authority, power, sway, clout (slang).
14. slang
A set measure of a drug, especially an illegal one.
15a. statistics.
The frequency of an element within a frequency distribution;
15b. statistics.
The number denoting this.

verb weighted, weighting

1. To add weight to something, eg to restrict movement.
2. To hold it down in this way.

Form: weight something down (often)
3. To burden or oppress someone.

Thesaurus: encumber, impede, overburden, handicap, hold down, charge, keep down, weigh down.
4. To assign a handicap weight to (a horse).
5. To arrange or organize something so as to have an unevenness or bias.

Example: a tax system weighted in favour of the wealthy
6. statistics.
To attach numbers indicating their relative frequency to (items in a frequency distribution).

Idiom: gain weight (put on weight)

To become fatter; to increase one's body size.

Idiom: lose weight

To become thinner; to decrease one's body size.

Idiom: pull one's weight

To do one's full share of work, etc.

Idiom: throw one's weight about

colloq
To behave in an arrogant or domineering manner.

Idiom: throw one's weight behind something

To give one's full support to it.

Idiom: worth one's weight in gold

Exceptionally useful or helpful.

Etymology: Anglo-Saxon wiht.