Adjective
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lacking clarity or distinctness
"a dim figure in the distance"
"only a faint recollection"
"shadowy figures in the gloom"
"saw a vague outline of a building through the fog"
"a few wispy memories of childhood"
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not precisely limited, determined, or distinguished
"an undefined term"
"undefined authority"
"some undefined sense of excitement"
"vague feelings of sadness"
"a vague uneasiness"
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not clearly understood or expressed
"an obscure turn of phrase"
"an impulse to go off and fight certain obscure battles of his own spirit"-Anatole Broyard
"their descriptions of human behavior become vague, dull, and unclear"- P.A.Sorokin
"vague...forms of speech...have so long passed for mysteries of science"- John Locke