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1. lacking sufficient money to live at a standard considered comfortable or normal in a society:

〈国･人･地域が〉貧しい, 貧乏な, 貧困の(↔ rich)

e.g. people who were too poor to afford a telephone

〖the ～; 名詞的に; 集合的に〗 貧しい人々［階級］ (!複数扱い)

e.g. (as plural noun the poor) : the gap between the rich and the poor has widened.

(of a place) inhabited by people without sufficient money:

e.g. a poor area with run-down movie theaters and overcrowded schools.

2. worse than is usual, expected, or desirable; of a low or inferior standard or quality:

〈品質･状況などが〉乏しい, 粗末な, 貧弱な, 芳しくない; 〈記憶力･視力･聴力が〉弱い, 劣って; 〈土壌が〉やせて; 〈可能性が〉低い; 〈判断･言い訳が〉不適切な; 〈健康状態･成績が〉悪い; 〈数量が〉低い, 水準以下で

e.g. many people are eating a very poor diet

e.g. her work was poor.

predicative (poor in) deficient or lacking in:

〈物･場所が〉 【物質･資源などに】欠けて, 不足して «in»

e.g. the water is poor in nutrients.

dated used ironically to deprecate something belonging to or offered by oneself:

e.g. he is, in my poor opinion, a more handsome young man.

3. attributive (of a person) considered to be deserving of pity or sympathy:

｟話｠ 〖名詞の前で〗気の毒な, かわいそうな (!この場合「貧しい」の意味はない)

e.g. they inquired after poor Dorothy's broken hip.

extremely poor.

a wealthy young person whose money brings them no contentment (often used as an expression of mock sympathy).

an inferior or cheaper substitute for the thing specified:

e.g. corduroy has always been the poor man's velvet.

a person or thing that is considered inferior or subordinate to others of the same type or group:

e.g. for many years radio has been the poor relation of the media.

regard with disfavor or disapproval.

Middle English: from Old French poure, from Latin pauper.