brim noun
1 top edge of a cup, bowl, etc.
PHRASES be filled/full to the brim, fill sth to the brim She filled the bowl to the brim.
2 flat edge around the bottom of a hat
ADJ. broad, deep, wide a straw hat with a wide brim
PREP. beneath/under a/the ~ She watched the crowd from beneath the brim of her hat.
You can also check other dicts: brim (English, 中文解释 ), wordnet sense, Collins Definition