Meaning
just under; a little less than; just short of

例文
彼はせいぜい１００ドル足らずしか持っていない。
He has a hundred dollars at most.

彼のビジネスプランは立派だけど、勘定あって銭足らず、という気もするけどね。
His business plan looks good on paper but I get the feeling it would never work in practice.

村の郵便局まで１キロ足らずだった。
It was less than one kilometer to the village post office.

私はその仕事を１時間足らずで終えた。
I finished the work in less than an hour.