English is weird in that the infinitive of verbs takes the form of adding the word "to" before the root word so it seems optional (and like you look up verbs in the dictionary in English without the "to"). But in the context of language learning it's a pretty important distinction.
But verbs in isolation (as in a dictionary entry or a translation) are generally interpreted as the infinitive in English. The infinitive is also described as the dictionary form of a verb. If it's just the single word standing alone and not a sentence, then it's not the imperative.