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# What is the opposite of “diagonal”?

## What is the antonym of “diagonal”?

The antonyms of diagonal are straight, level, and horizontal. These antonyms describe lines or surfaces that are not slanted or inclined.

## Brief Definitions of the Antonym(s)

Learn when and how to use these words with these examples!

Extending uniformly in one direction without curves or bends.

Example

She drew a straight line from one end of the paper to the other.

Having a flat or even surface; not sloping or tilted.

Example

The carpenter made sure the table was level before attaching the legs.

Parallel to the plane of the horizon; level or flat.

Example

The sun was setting on the horizontal line of the ocean.

## How are these antonyms different from each other?

• 1Straight refers to a line that does not curve or bend.
• 2Level describes a surface that is flat and even, without any slope or tilt.
• 3Horizontal refers to a line or surface that is parallel to the horizon.

## Good things to know

• 1Geometry: Use these antonyms to describe lines and surfaces in geometry.
• 2Architecture: Incorporate these antonyms when describing the orientation of buildings and structures.
• 3Navigation: Utilize these antonyms to give directions and describe the position of objects.
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Remember this!

The antonyms of diagonal describe lines or surfaces that are not slanted or inclined. Straight refers to a line that does not curve or bend, level describes a surface that is flat and even, and horizontal refers to a line or surface that is parallel to the horizon. Use these antonyms in geometry, architecture, navigation, and other contexts where orientation and position are important.

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