testing

TES-ting/ˈtɛs.tɪŋ/

3 meanings of testing

1
checkingnouncountable or uncountable
The act of carrying out a test in order to try out, prove, or evaluate something.
Extensive testing revealed several weaknesses in the design.
The laboratory's testing confirmed that the water was safe to drink.
UsageUsually with no a: months of testing, testing of a product, testing for lead.
Similarevaluation, trials, experimentation, analysis, examination
2
verb
Present participle and gerund of test, used in verb forms such as "are testing a new drug" or "after testing it."
The engineers are testing the engine under extreme heat.
Researchers are testing whether the vaccine prevents infection.
UsageTakes an object or a clause, testing the engine, testing whether it works; samples can also test positive for something.
3
difficultadjective
Difficult and demanding, requiring considerable effort or endurance.
The interview included a number of testing questions about ethics.
Caring for a sick relative day after day can be emotionally testing.
UsageTakes very and more: a testing time, very testing for the whole family.
Similardemanding, challenging, difficult, tough, taxing
Oppositeeasy, undemanding, simple

testing is a form of test

test, verb: To try out or examine something, often under real or extreme conditions, to find out how well it works, whether it is genuine, or whether it meets a standard. Full entry

Forms: testtests he/she/ittesting -ing formtested past tense, past participle
Spelling: test → testing: add -ing

Practice

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