Definition

Extremely thin or slender, often used to describe materials or objects that have a very small thickness.

Example

The ultrathin laptop is lightweight and easy to carry.

Conversation

Have you seen my new phone case?

Yeah, it looks really ultrathin and sleek!

I love how it doesn't add bulk to my phone.

Exactly! It's perfect for keeping it lightweight.

Synonyms & Antonyms

Root Explanation

Ultrathin → It is formed from "ultra-" (meaning beyond or extremely) and "thin" (from Old English "þynne", meaning having little thickness). The word "ultrathin" describes something that is extremely thin or has very little thickness.

Memory Tip

Think of something that is 'beyond' ('ultra-') just being 'thin' — that's why ultrathin means extremely thin.

Visually Confused Words