light as a feather

(as) light as a feather

Exceptionally light in weight. The material in the coat is durable and waterproof, but feels as light as a feather. Don't worry, the box is big but it's light as a feather.
See also: feather, light
Farlex Dictionary of Idioms.

*light as a feather

 and *light as air
Cliché light in weight; [of cakes and pastries] delicate and airy. (*Also: as ~.) Carrying Esther from the car to the house was no problem; she was as light as a feather. What a delicious cake, Tom! And light as air, too.
See also: feather, light
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

light as a feather

Extremely lightweight. This simile can be used to refer either to physical weight, as in This load is light as a feather, or to texture, as in This cake is light as a feather. [Mid-1500s]
See also: feather, light
The American Heritage® Dictionary of Idioms by Christine Ammer.

light as a feather

If someone or something is as light as a feather, they weigh very little. `Put me down,' I said. `I'm too heavy.' `Light as a feather,' he retorted, ignoring my request. Although it was a large package, it was as light as a feather.
See also: feather, light
Collins COBUILD Idioms Dictionary, 3rd ed.

(as) light as ˈair/a ˈfeather

weighing very little; very light: I love this jacket — it’s really warm but it’s as light as a feather. Her sponge cakes are as light as air. OPPOSITE: weigh (half) a ton
See also: air, feather, light
Farlex Partner Idioms Dictionary

light as a feather

Extremely lightweight. This simile dates from the sixteenth century, appearing in Edward Hall’s Chronicles (1548) and many times thereafter. Indeed, it eventually gave rise to the word featherweight, used in boxing to describe a contender who weighs less than 126 pounds (57 kg).
See also: feather, light
The Dictionary of Clichés by Christine Ammer
See also:
  • (as) light as a feather
  • light as air/a feather
  • (as) light as air
  • be as light as a feather
  • flash (something) at (someone or something)
  • flash at
  • be in (one's) light
  • be in somebody's light
  • be light on (something)
  • be light on something