Someone who is reserved keeps their feelings hidden.
He was unemotional, quiet, and reserved.
他感情淡漠、沉默寡言、矜持内敛。
A table in a restaurant or a seat in a theatre that is reserved is being kept for someone rather than given or sold to anyone else.
Seats, or sometimes entire tables, were reserved.
许多座位,有时甚至是整张桌子,都被订走了。