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interval; space; interstice; threshold
valley; gorge; ravine
loophole (in a wall); crenel; eyelet
「間」 has other readings with different meanings.
雲の間から太陽が見えた。
I saw the sun through the clouds.
二つの山のはざまを川が静かに流れている。
A river flows quietly through the gorge between the two mountains.
ビルの間を歩いていった。
I walked between the buildings.