A gap or opening — a small space between things; a crevice or opening.
ドアの隙に手を挟まないよう注意する。
Be careful not to get your hand caught in the gap of the door.
窓の隙から冷たい風が入ってくる。
Cold air comes in through the gap in the window.
An opportunity or chance — often used for a brief opening in someone's guard or attention that can be taken advantage of.
試合中のわずかな隙を突いてゴールを決めた。
He scored a goal by exploiting a slight gap during the match.
相手の隙を見て交渉条件を有利にした。
I spotted the opponent's weakness and turned the negotiation terms to my advantage.
Discord or disagreement — a rift or disharmony within relationships or groups.
長年の意見の相違で二人の間に隙ができた。
Years of differences of opinion created a rift between the two.
チーム内の隙を埋めるために話し合いが行われた。
A discussion was held to close the rift within the team.