noun · a railing or banister, often found on balconies or bridges

他凭槛远眺，看着江水流向远方。

a wooden or iron enclosure for confining animals or prisoners

那头猛虎被关在铁槛里。

the horizontal piece of wood or stone at the bottom of a door frame; a door sill

他跨过高高的门槛，走进了老屋。