Answer: Precooked rice means "rice that has already been cooked".
Step-by-step explanation: The word "precooked" has been formed with the prefix "pre-", the root "cook" and the suffix "-ed". On the one hand, the prefix "pre-" is used to express that something takes place before or earlier in time, while "-ed" is the suffix used to form the past tense of regular verbs in English. Taking this into account, it can be figured out that "precooked rice" means rice that has been cooked beforehand or earlier in time, that is to say it makes reference to rice that has already been cooked and that only needs to be heated.