signed in

1.签到;登记,当你到达某个地点时,在名单上签字

2.登记,当你归还某项借出的物品时,在名单上签字

3.签入,在名单上签字以获得入场资格,尤其是会员制俱乐部

4.登录,使用用户名和密码访问网络内容,尤其指访问网站

1.to write your name on an official list when you arrive at a place

2.if you sign in something that you have borrowed, you write your name on an official list to show that you have returned it

3.to secure admission of a guest, especially in a members-only club, by putting your signature on a register

4.to access a network place, especially a website, by inputting your user name and password