Meaning:
"Chime in" is a verb that means to join or interrupt a conversation, often to add your opinion or thoughts. It can also mean to agree with someone or to add to what someone else is saying.
While "chime in" primarily refers to speaking in a conversation, "chime" on its own can refer to the sound of bells ringing.
"Chime in" is itself a phrasal verb, as it combines the verb "chime" with the preposition "in," indicating the action of entering a conversation.
So, when you hear someone "chime in," think of them as joining a conversation, sometimes unexpectedly, to share their thoughts or agree with others.