There are 2 definitions of tester in English:

tester1

Line breaks: test¦er
Pronunciation: /ˈtɛstə
 
/

noun

  • 1A person who tests something, especially a new product.
    More example sentences
    • All products are tested blindly, so testers are not influenced by designer names and fancy packaging.
    • It is only on the basis of the tester's appraisal that we carry out any remedial work and then only if it is strictly necessary.
    • The testers used each product and timed the process of creating a Web site, including the addition of text, graphics, links and publishing to a Web server.
  • 1.1A person who tests another’s proficiency: testers seek only to establish a minimum level of performance necessary to graduate
    More example sentences
    • The selected testers, in addition to conducting the tests, asked the learner drivers a series of questions relating to basic maintenance of vehicles.
    • With the PADI ‘resort course’ that is available in most islands, it is quite possible to get underwater within a day; it consists of safety instruction and a tester in a pool, followed by a guided open-water dive on the reef.
    • The company has 22 tutors and 16 testers and does not use an automatic testing system, as is common practice in other workplaces.
  • 1.2A device that tests the functioning of something: a mains tester
    More example sentences
    • Heart valve testers are used by surgeons to check the function of mechanical heart valves after they have been sewn into the heart.
    • The tester offers a set-up function to allow operators to set various parameters used in testing configuration and memory storage.
    • Check each cell with a battery tester such as the Radio Shack 22-093.
  • 2A sample of a product provided so that customers can try it before buying it.
    More example sentences
    • Additionally, create inviting retail displays that are visual, entertaining and that offer samples and testers.
    • To find your shade, squirt a little of the tester onto the back of your hand.

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Word of the day astrogation
Pronunciation: ˌastrə(ʊ)ˈgeɪʃ(ə)n
noun
(in science fiction) navigation in outer space

There are 2 definitions of tester in English:

tester2

Line breaks: tes¦ter
Pronunciation: /ˈtɛstə
 
/

noun

  • A canopy over a four-poster bed.
    More example sentences
    • She tossed her bag onto a lovely old four-poster bed complete with tester.
    • For the panel hanging behind the headboard, cut fabric long enough to hang from the tester, or framework, to just below the mattress.

Origin

late Middle English: from medieval Latin testerium, testrum, from a Romance word meaning 'head', based on Latin testa 'tile'.

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