0 past simple and past participle of underachieve
1 to do less well than you could or should:
Though the system underachieved in both financial management and development planning, participation - notably by elites - increased, and influenced the type and location of council projects.
The team exceeded expectations in the first season, and underachieved in the second.
With high expectations surrounding him entering the 201011 season, he grossly underachieved with a disappointing 3 goals and 13 points in 38 games.
Richmond has since regained a strong financial position, but with the exception of finals appearances in 1995, 2001 and 2013, the club has underachieved on the field.