签名于票据等的背面，认可；

1. 签名背面：indoors 在户内 | indorse 签名背面 | indorsee 被背书人

2. 保证：indoor 室内的 | indorse 保证 | indorse 背书(在票据背面签字

3. 背书(在票据背面签字：indorse 保证 | indorse 背书(在票据背面签字 | indorsee 背书人

4. 背书：519indoorsadv.在屋里;进入室内 | 520indorse背书 | 521indubitableadj. 不容置疑的

1. sign as evidence of legal transfer

    e.g. endorse cheques

    Synonym: endorse

2. guarantee as meeting a certain standard

    e.g. certified grade AAA meat

    Synonym: certifyendorse

3. be behind
    approve of

    e.g. He plumped for the Labor Party
           I backed Kennedy in 1960

    Synonym: backendorseplump forplunk forsupport

4. give support or one''s approval to

    e.g. I''ll second that motion
           I can''t back this plan
           endorse a new project

    Synonym: secondbackendorse