Meaning: you can believe it, you can count on it. For example, “Arturo’s word is good. You can believe what he says.”
Category: Idioms
Idioms are expressions with greater meaning. Phrases like "nick of time" or "in other words" or "for heaven's sake". Definition: a group of words in a fixed order that have a particular meaning that is different from the meanings of each word understood on its own:
word is out
Meaning: I have heard, people are saying, rumor has it. For example, “Word is out that you’re moving to Denver. Is it true?”
word of honor
Meaning: solemn promise, take an oath. For example, “He gave me his word of honor that he will pay me on Friday.”