Quick definitions from WordNet (trial-and-error)
▸ adjective: relating to solving problems by experience rather than theory ("They adopted a trial-and-error procedure")
▸ adjective: trying out various means or theories until error is satisfactorily reduced or eliminated ("He argued that all learning is a trial-and-error process that resembles biological evolution")
▸ adjective: relating to solving problems by experience rather than theory ("They adopted a trial-and-error procedure")
▸ adjective: trying out various means or theories until error is satisfactorily reduced or eliminated ("He argued that all learning is a trial-and-error process that resembles biological evolution")