If I am participating in the meeting I am in the meeting. "Sorry, I can't talk just now, I'm in a meeting." We would only use "the meeting" if it is a specific meeting. "Yes I know what he said because I was there in the meeting!" "Are you going to the meeting today?" If I am watching or reporting on a meeting but I am not member of it then I am at a meeting. Journalist - "I am here at a meeting of the shareholders and I can tell you they are angry." PAST TENSE "I was in a meeting yesterday where this was discussed." "I was at a meeting yesterday where this was discussed. "At" is used more often than "in" if the meeting was in the past. They mean the same but "in" implies more involvement than "at"

Hello Paresh! "In the meeting" means to be in the room where the meeting is taking place. For example: "While I was in the meeting I noticed that the airconditioning was turned too high and that the members were starting to fan themselves with their documents, to cool down". "At the meeting" means to attend a gathering or event. For example"The football association had a rough idea of how many people would be at the meeting, due to the number of RSVPs that they had received". I hope that helps! I hope that helps!

Hello Paresh, Well, English will never atop surprising the learners I guess! Regarding your question, both can be correct, it all depends on the context. Pay attention to these two sentences extracted from Longman dictionary: 1. I’ll raise the matter at the next meeting. 2. She said that Mr. Coleby was in a meeting. “In a/the meeting”, which is used more commonly, addresses a literal room in which some people are discussing some issues. “At a/the meeting” is generally about the concept of a meeting, but not precisely a room in which people are talking about a particular subject.