to ask for a seat, table, room, etc. to be available for you or sb else at a future time 预订，预约（座位、席位、房间等）◆I'd like to reserve a table for three for eight o'clock. 我想预订八点钟三个人的餐桌。◆I reserved a ticket online. 我在网上预订了票。➡book
to keep sth so that it cannot be used by any other person or for any other reason 保留；储备◆privileges normally reserved for executives 通常为行政人员保留的特权◆The company said that it would reserve $3 million to cover legal costs. 公司称要保留 300 万元以支付诉讼费用。
to have or keep a particular power 拥有，保留（某种权利）◆The company reserves the right to check the way employees use the Internet and email. 公司保留检查员工使用互联网和电子邮件方式的权利。◆All rights reserved(= nobody else can publish or copy this material). 版权所有。
to not make a decision until you have all the evidence 保留（意见）◆I'd prefer to reserve judgement(= not make a decision) until I know all the facts. 在了解全部事实之前我不想作决定。