The Sluch (, , ) is a river, a right tributary of the Horyn River, which flows through Ukraine. It has a length of 451 km and a drainage basin of 13,800 km². The Sluch river takes its source in the Ukrainian province of Khmelnytskyi, and then flows through the Zhytomyr, and Rivne oblasts, and flows briefly along the Ukrainian-Belarusian border before finally emptying into the Horyn.
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