Longman Dictionary of Contemporary English
weigh-in
noun
EXAMPLES FROM CORPUS
▪ At today's weigh-in, he tipped the scales at just over 15 stone.
▪ Attack temptation with activity and look forward to your second weigh-in and measuring day.
▪ But Cambridge will take heart from today's weigh-in.
▪ Earlier in the day, the young men had lined up for a weigh-in.
▪ The weigh-in will be on the car park with the presentation at the Dunwich Ship Inn.
▪ The day of the competition Ensure your entry arrives at the competition venue in sufficient time to register and weigh-in.
▪ Tomorrow is the final weigh-in and measuring session for this 28-day period.
Wiktionary
weigh-in
n. The process of determine a competitor's body weight prior to an event, especially to ensure it is within the weight restrictions.