What is Treegle?

Treegle is an expand and collapse dictionary based on The Online Plain Text English Dictionary (OPTED).

(Click to Start Searching)

Benefits of Treegle

(1) By displaying multiple successive dictionary lookups on the same page, we reduce the amount of time spent opening up and navigating through multiple pages and tabs.

(2) By arranging definitions into a tree, we clarify how each piece of knowledge comes together to contribute to the meaning of a word.

(3) By highlighting related words, we build word associations that improve definition retention.


1. Enter a word and click search:

Instructions 1

2. Click to cycle through alternative definitions:

Instructions 2

3. Click any word to expand or collapse its definition:

Instructions 3


Do you have any questions about the Treegle project? Please feel free to send us a message if there is anything that we can help you with.

Created by: Michael Wehar.
* Try our Dictionary API: dictionary.farm