Definitions:

1. A very lightweight, small aircraft, typically used for recreation, which usually carries one or two people and is subject to minimal regulation in many countries. NOUN
   • He flew an ultralight over the fields at sunrise.
2. Describing anything that is extremely light in weight, often used in contexts like backpacking, camping, or technical clothing. ADJECTIVE
   • The hiker packed ultralight gear to reduce strain on long treks.
   • These ultralight running shoes weigh less than 200 grams.

Synonyms:

• lightweight
• microlight