1. 配偶；（性）伴侣
    Your partner is the person you are married to or are having a romantic or sexual relationship with.

    e.g. Wanting other friends doesn't mean you don't love your partner.
           想交其他朋友并不意味着你不爱你的伴侣。
    e.g. ...his choice of marriage partner.
           他对婚姻伴侣的选择

2. 同伴；搭档
    Your partner is the person you are doing something with, for example dancing with or playing with in a game against two other people.

partner的近义词

    e.g. ...to dance with a partner...
           和舞伴跳舞
    e.g. My partner for the event was the marvellous American player.
           那场比赛我的搭档是那位了不起的美国选手。

3. 合伙人
    The partners in a firm or business are the people who share the ownership of it.

    e.g. He's a partner in a Chicago law firm.
           他是芝加哥一家律师事务所的合伙人。
    e.g. ...her business partner Max Hampshire.
           她生意上的合伙人马克斯·汉普希尔

4. 盟友；伙伴
    The partner of a country or organization is another country or organization with which they work or do business.

    e.g. Spain has been one of Cuba's major trading partners.
           西班牙一直是古巴的主要贸易伙伴之一。
    e.g. ...the main coalition partner in the Slovak government.
           斯洛伐克联合政府中的主要盟友

5. （比赛或舞蹈中）做…的伙伴（或搭档），与…配对
    If you partner someone, you are their partner in a game or in a dance.

    e.g. He had partnered the famous Russian ballerina...
           他已经和那位著名的俄罗斯芭蕾舞女演员做了搭档。
    e.g. He will be partnered by Ian Baker, the defending champion...
           他将和卫冕冠军伊恩·贝克搭档。