1.
heaped, piled high, overflowing
A large amount of something piled up like a mountain, typically food on a plate.
ごはんを山盛りにした。
I piled the rice high.
Literally "piled like a mountain." Describes food or other items heaped generously on a plate or surface. Can function as a noun (山盛りのごはん) or adverbially (山盛りに盛る).
Forms
山 (mountain) + 盛り (serving, piling).
Common patterns
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Casual and vivid. Commonly used in everyday conversation about food. Can also be used figuratively: 仕事が山盛り (piled up with work).