Meaning of TESTING in English

I. noun

( -s )

Etymology: from gerund of test (II)

: an act or process of subjecting to test : examination , trial

the testing of 50 million children … for tuberculosis — Paul Harris

laboratories concerned … with commercial testing — Science

II. adjective

Etymology: from present past. of test (II)

1. : of, relating to, or used for demonstration or experiment

testing procedure

testing ground

2. : requiring maximum effort or ability

confronted with a most difficult and testing problem — Ernest Bevin

felt out of practice for severe rock climbing and wanted something less testing — Tom Weir

• test·ing·ly adverb

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.