Meaning of 至弱 in Japanese

It seems that your search contains the following:

Definition of 至弱

じゃく(jaku) 【弱】

(n, n-suf) weakness; the weak
６月末に参加者を募ったら１週間弱で約５００席が予約でいっぱいになった。
When participants were sought at the end of June all, about 500, seats were reserved in under a week.
(n-suf) little less than; fewer than; under →Related words: 小

し(shi) 【至】

しじゃくをもってしきょうにあたる(shijakuwomotteshikyouniataru) 【至弱をもって至強にあたる】