1 a job, position, etc that is suitable for you 合适的职务、位置等: to find your niche in life 找到可以安身立命的位置

2 (in business) an opportunity to sell a particular product to a particular group of people （生意上）将某种产品卖给某些人的机会

3 a place in a wall that is further back, where a statue, etc can be put （墙壁上凹入处放雕像等的）壁龛