Definition of define verb from the Oxford Advanced American Dictionary

        

    define

     verb
    verb
    NAmE//dɪˈfaɪn//
     
    Verb Forms present simple I / you / we / they define
     
    he / she / it defines
     
    past simple defined
     
    -ing form defining
     
     
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  1. 1to say or explain what the meaning of a word or phrase is define something The term “mental illness” is difficult to define. define something as something Life imprisonment is defined as 60 years under state law.
  2. 2to describe or show something accurately define something We need to define the task ahead very clearly. The difficulty of a problem was defined in terms of how long it took to complete. define what, how, etc. … It is difficult to define what makes him so popular.
  3. 3define something to show clearly a line, shape, or edge The mountain was sharply defined against the sky.
NAmE//dɪˈfaɪnəbl//
 
adjective
Language Bankdefinedefining terms It is important to clarify what is meant by climate change. Climate change can/may be defined as “the long-term fluctuations in temperature, precipitation, wind, and other aspects of the earth's climate.” A generally accepted definition of global warming is the gradual increase in the overall temperature of the earth's atmosphere due to the greenhouse effect. The greenhouse effect is defined by the author as the process by which heat from the sun is trapped in the earth's atmosphere, causing the temperature of the earth to rise. The author uses the term “climate change”to refer to any significant change in measures of climate lasting for an extended period. The term “carbon footprint”refers to the amount of carbon dioxide released into the atmosphere as a result of the activities of an individual or organization. Scientists suggest that increased carbon dioxide in the atmosphere will result in an increase in global temperatures, and the term “global warming”is used to describe this phenomenon.
See the Oxford Advanced Learner's Dictionary entry: define