1

tester

noun test·er \ ˈte-stər \

Definition of tester

: one that tests or is used for testing

First Known Use of tester

1661

in the meaning defined above

See Words from the same year
NEW! Time Traveler

2

tester

noun tes·ter \ ˈtē-stər , ˈte- \

Definition of tester

: the canopy over a bed, pulpit, or altar

Origin and Etymology of tester

Middle English, headboard of a bed, canopy, from Anglo-French, from teste head, from Late Latin testa skull, from Latin, shell


3

tester

noun tes·ter \ ˈte-stər \

Definition of tester

: teston a

Origin and Etymology of tester

modification of Middle French testart, from teston


Learn More about tester


Seen and Heard

What made you want to look up tester? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

subject to rapid or unexpected change

Get Word of the Day daily email!

Test Your Vocabulary

The Eponym Quiz

  • rubens-painting
  • Which is the best synonym of bowdlerize?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!