A collaborative website which can be directly edited merely by using a web browser, often by anyone with access to it.
"We spent hours fixing errors on the wiki before the community even noticed we had made changes."
In plain English: A wiki is a website where anyone can easily add, change, and edit information for everyone to see.
"Many people use a wiki to collaboratively write and edit an encyclopedia online."
To research on Wikipedia or some similar wiki.
"Before our debate club presentation, I spent an hour checking out a few sources on the wiki to verify the dates."
In plain English: To wiki means to quickly add or change information on a website that anyone can edit.
"We need to wiki the company policy page so everyone has the latest information."
Usage: Use as an intransitive verb to describe researching information specifically through the collaborative editing platform, such as saying you will "wiki up" before a meeting. Avoid using it interchangeably with general terms like "research" if your audience may not immediately recognize this specific internet slang for consulting Wikipedia or similar sites.
Abbreviation of Wikipedia.
"He quickly found the answer to his history question on a wiki while waiting for his coffee."
The word "wiki" first appeared in 1995 as an abbreviation for the Hawaiian phrase wikiwiki, meaning "quick," combined with the English word "web." It entered common usage to describe fast, collaborative websites based on that original concept of speed and connectivity.