to have your weight measured, especially before a contest, race, etc. Both boxers weighed in at several pounds below the limit. Her baby daughter weighed in at 6lb 4oz. related noun weigh-in
(informal) to join in a discussion, an argument, an activity, etc. by saying something important, persuading somebody, or doing something to help We all weighed in with our suggestions. Finally the government weighed in with financial aid.