Definition

This term describes a method of visiting nodes in a tree structure where the root node is processed before its child nodes.

Example

In a preorder traversal, the root is visited first, followed by the left subtree and then the right subtree.

Conversation

Have you ever tried a preorder for a video game release?

No, I usually just wait for it to come out.

I find that preorder deals can be really tempting, though.

True, especially when they offer exclusive content.

Synonyms & Antonyms

Definition

A type of relation in mathematics where every element is related to itself and if one element is related to a second, and that second is related to a third, then the first is also related to the third.

Example

In set theory, a preorder is used to describe a relationship between elements that satisfies certain properties.

Conversation

Did you see the new game that's available for preorder?

Yeah, I heard it's supposed to be amazing!

I think I might just preorder it to get the bonus content.

Definition

To place an order for something before it is available or released.

Example

I decided to preorder the new video game so I could get it on the release day.

Tense Forms

Conversation

Have you heard about that new game coming out next month?

Yeah, I can’t wait to play it!

I think I might preorder it to get the bonus content.

Root Explanation

Preorder → It is formed from "pre-" (meaning before) and "order" (from Latin "ordo", meaning arrangement or sequence). The word "preorder" means to arrange or order something before it is available or released.

Memory Tip

Think of 'before' ('pre-') and 'arrangement' ('order') to remember that 'preorder' means to arrange something ahead of time.

Visually Confused Words