Meaning of 行き違い in Japanese

Definition of 行き違い

いきちがい(ikichigai) · ゆきちがい(yukichigai) 【行き違い ·行違い】

(n) crossing without meeting (e.g. letters in the post, people on the road); going astray
difference of opinion; misunderstanding; estrangement; disagreement

いきちがいになる(ikichigaininaru) · ゆきちがいになる(yukichigaininaru) 【行き違いになる】

(exp, v5r) to miss each other; to cross (in the post); to go astray; to go wrong
私たちの手紙は行き違いになった。
Our letters crossed each other.

Our letters probably crossed in the mail.

Your letter crossed mine.