noun
new rice; first rice crop of the year
Refers to rice harvested in the current year, as opposed to 古米 (old rice). Often associated with freshness and seasonal enjoyment.
See also: 古米
秋になると、新米が店頭に並び始める。
In autumn, new rice starts appearing in stores.
noun, noun which may take the genitive case particle 'no'
Figurative extension from 'new rice': someone new to a job, organization, or activity. Often used with a slightly self-deprecating or humble tone, e.g., 新米の私 (a novice like me).
新米の教師なので、まだ授業に慣れていません。
I'm a novice teacher, so I'm still not used to teaching classes.
新米社員はまず研修を受ける。
New employees first undergo training.