Sign

bảng chỉ dẫn

(flat object bearing a message)

dấu

(a fact that shows that something exists or may happen)

tín hiệu

(a fact that shows that something exists or may happen)

kí

(to write one's signature on a document)

kí tên

(to write one's signature on a document)

ký tên

(to make (a document) official by writing one's signature)