This is the 619th most frequent French word.
meilleures
"Meilleures" means "best" (feminine plural).
'Meilleures' is employed to qualify 'notes', implying they are the highest or most favorable grades achieved.
Elle a reçu les meilleures notes de sa classe cette année.
She received the best grades in her class this year.
'Meilleures' appears in a comparative context, describing 'chaussures' to indicate they are more suitable or fitting for hiking compared to others.
Ces chaussures sont meilleures pour la randonnée que celles-là.
These shoes are better for hiking than those ones.
'Meilleures' is used as the superlative of 'bonne', modifying the noun 'idées' to express the highest degree of goodness among all ideas.