to have preconceived ideas about sth
1idea — noun 1 plan/suggestion ADJECTIVE ▪ bright, brilliant, clever, excellent, good, great, marvellous/marvelous, nice, wonderful ▪ …
1idea — noun 1 plan/suggestion ADJECTIVE ▪ bright, brilliant, clever, excellent, good, great, marvellous/marvelous, nice, wonderful ▪ …