grain noun
1 seeds of wheat, etc.
VERB + GRAIN grow, produce | sow | store
GRAIN + NOUN harvest, production, yield | exports, imports
2 natural pattern of lines in wood
ADJ. fine, smooth | coarse, rough | natural This wood has a beautiful natural grain.
PREP. across/against the ~, along/with the ~ Cut the wood along the grain.
You can also check other dicts: grain (English, 中文解释 ), wordnet sense, Collins Definition