narrow² v [I,T] to become more narrow, or make something more narrow （使）变窄: The road narrows here. 这条路在这里变窄了。
narrow sth ↔ down to reduce the number of people or things that you can choose from, before making a final decision 缩小…的选择范围: We've narrowed down the number of candidates to just two. 我们把候选人的数目缩小到两个。