Sign up and Weigh in

Sign up verb - Engage by written agreement.

Weigh in and sign up are semantically related in record topic. In some cases you can use "Weigh in" instead a verb "Sign up".

Weigh in verb - To make a statement of one's opinion.

Sign up and weigh in are semantically related in record topic. Sometimes you can use "Sign up" instead a verb "Weigh in".