lightweight

American  

[lahyt-weyt] / ˈlaɪtˌweɪt /

adjective

1. light in weight.

2. being lighter in weight, texture, etc., than another item or object of identical use, quality, or function: a lightweight alloy for ship construction.

   a lightweight topcoat;

   a lightweight alloy for ship construction.

3. without seriousness of purpose; trivial or trifling.

   lightweight reading.

4. of or relating to a lightweight.

   He's the new lightweight contender.

5. (of a horse, especially a hunter) able to carry up to 165 pounds (75 kilograms).

---

noun

• lightweights
  plural

1. a person of less than average weight.

2. Informal. a person who is of little influence, importance, or effect.

3. a boxer or other contestant intermediate in weight between a featherweight, and a welterweight, especially a professional boxer weighing between 126 and 135 pounds (56.7–61 kilograms).

lightweight British  

/ ˈlaɪtˌweɪt /

adjective

1. of a relatively light weight

2. not serious; trivial

---

noun

1. a person or animal of a relatively light weight

2. 1. a professional boxer weighing 130–135 pounds (59–61 kg)

   2. an amateur boxer weighing 57–60 kg (126–132 pounds)

   3. ( as modifier )

      the lightweight contender

3. a wrestler in a similar weight category (usually 115–126 pounds (52–57 kg))

4. informal a person of little importance or influence

Other Word Forms

Derived Forms

• ultralightweight
  adjective

Inflected Forms

Nouns

• lightweights
  plural

Etymology

Origin of lightweight

First recorded in 1765–75; light ² + weight

Explanation

When an object is lightweight, it weighs much less than other similar objects. A person is a lightweight if they can't handle much — if you get full after a small meal, big eaters might refer to you as a lightweight. Break lightweight apart — light + weight — and you see its definition right there in its root words. Someone who is called a lightweight is either a professional boxer who weighs under 135 pounds or he's someone with little importance or ability. When a company is looking to make layoffs, it's the lightweight employees, or those who just aren't important to the business that often get axed first.

Example Sentences

See Examples For:

lightweight lightweights

Six years later, he unveiled a lightweight “Soybean Car,” built from 14 soy-derived plastic panels attached to a tubular steel frame.

From Salon ● Sep. 13, 2026

One is a lightweight reality series that follows a family’s trek across the United States.

From Los Angeles Times ● Aug. 26, 2026

Medieval pilgrims may have had faith; I had lightweight REI clothing, moleskin, Hokas and retinol.

From The Wall Street Journal ● Aug. 25, 2026

Lopez, who has previously held world titles at lightweight and light-welterweight, secured a majority decision but declined to call out Briton Jack Catterall as his first defence.

From BBC ● Aug. 23, 2026

Designed to be lightweight and easy to carry and set up, Abwehr Enigma was a medium-security model.

From "The Woman All Spies Fear" by Amy Butler Greenfield

The audience might forget those things, but it will remember how silly the suits looked as they struggled to deal with perceived lightweights who had organized against them.

From Slate ● Sep. 15, 2023

The two lightweights aren’t even fighting for a title or a fringe belt — making it a true grudge match.

From Washington Times ● Apr. 20, 2023

Donovan’s offense rarely utilized backs in the passing game, while Lake philosophically advocated for bulkier backs — joking that “they don’t let heavyweight fighters fight lightweights for a reason: the heavyweight fighter’s going to win.”

From Seattle Times ● Mar. 30, 2022

In the lightweights there could be six or seven fights made.

From BBC ● Dec. 31, 2021

"We're lightweights," Mabel tried to joke, but her voice was thick with regret.

From "We Are Okay" by Nina LaCour