The Japanese noun 'そば' primarily refers to 'buckwheat', a type of grain, and by extension, it also refers to 'noodles' made from buckwheat flour. These noodles are a staple in Japanese cuisine and are often served either chilled with a dipping sauce or in a hot broth as a soup. Example sentences include: I ate buckwheat noodles for lunch「昼ご飯にそばを食べた」(ひるごはんにそばをたべた). This restaurant serves delicious soba「この店は美味しいそばを出す」(このみせはおいしいそばをだす). Note that 'そば' can also mean 'nearby' or 'beside' in different contexts, but this is a homophone and not related to the food meaning.