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the meaning of "he is of their opinion."

The using of opinion + of is very common, but I cannot find the usage of of+opinion in the dictionary.

When we say a person of other people's opinion ("he is of their opinion."), does it mean that other people think he is right, or that other people think his idea is similar to theirs, or there is other meaning?

Thx in advance.


  • @haydie, the OED gives as one of the earliest senses of opinion

    1. c. to be of (the) opinion (that): to hold the belief or view; to think (that). Also with further syntactic variation.

    Their earliest quote of that use in from 1425. Two interesting quotes from American statesmen:

    1735 B. Franklin Man of Sense 11 Feb. in Papers (1960) II. 16 I am really of that Opinion.
    1785 T. Jefferson Let. 25 Sept. in Papers (1953) VIII. 549 If you are of the same opinion I would trouble you to send me two sets of table cloths and napkins.

    Franklin believed something that some other people believed.
    Jefferson wanted to know whether some other people believed what he believed.

    So he is of their opinion means 'he believes what they believe.'

  • I should have added that
    He is of their opinion
    is just a stylistically formal and slightly old-fashioned way of saying
    'He agrees with them'.

  • @DavidCrosbie

    Yes, it is quite old-fashioned. I counter this when i read an article written in 1909.
    I get what it means now.
    Thanks so much :)

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