プログレッシブ和英中辞典(第4版)の解説
しりあい【知り合い】
an acquaintance
知り合いになる
get to know a person／become [get] acquainted with a person
知り合いが少ない［多い］
She knows few [a lot of] people.／She has few [a lot of] acquaintances.
私たちは長年の［昨今の］知り合いです
We have known each other for a long [short] time.
なんとかしてその実業家と知り合いになろうとした
He tried to scrape up an acquaintance with that businessman.