Definition

A device that measures how high something is above sea level, often used in airplanes to detect changes in altitude by sensing pressure changes.

Example

The pilot checked the altimeter to ensure they were flying at the correct altitude.

Conversation

Have you ever used an altimeter during hiking?

No, I haven't. What does it do?

It helps you measure your elevation above sea level.

That sounds really useful! I should get one for my next trip.

Synonyms & Antonyms

Root Explanation

Altimeter → It is formed from "altus" (meaning high) and "metrum" (meaning measure). The word "altimeter" refers to an instrument that measures altitude or height above a reference point, typically sea level.

Memory Tip

Think of measuring something that is 'high' ('altus') — that's why an altimeter is used to measure altitude.

Visually Confused Words