1to pile up
2repeated
3to fold
4classifier: stack, pile (of thin objects)
5classifier for repeated sections in a musical composition
Examples
zài在yǎn眼pí皮shàng上qīng轻qīng轻dié叠jiā加jīn金sè色yǎn眼yǐng影。
在眼皮上轻轻叠加金色眼影。
Gently layer gold eyeshadow on the eyelids.
喂，请问现在能给我马上送一叠稿子吗？
Hey, could you send over a stack of manuscripts straight away?
书桌上一叠专业书里有几本卡通书混在里面。
There were some graphic novels mixed into the pile of specialty books on the desk.