Test definition is - a means of testing: such as. Test(s) or TEST may refer to: Test (assessment), an assessment intended to measure the respondents' knowledge or other abilities. Xfinity Speed Test tests your Internet connection speed. Use our free bandwidth test to check your speed and get the most from your ISP. 1 day ago A New Zealand firm reduced its workweek to 32 hours over four days, and found that workers were more productive during their time at work. New HTML5 speed test, no Flash From Old French test (“an earthen vessel, especially a pot in which metals were tried”), from Latin testum (“the lid of an earthen vessel, an earthen vessel, Check the speed, quality and performance of your Internet connection with the AT&T Internet speed test. The internet speed test trusted by millions. How to use test in a sentence. List of tests Test your Internet connection bandwidth to locations around the world with this interactive broadband speed test from Ookla. Online tests and testing for certification, practice tests, test making tools, medical testing and more.