We need a plan.

we Pronoun

— The person speaking and other people with him or her. "Are you and Mia still going?" "No, were finished." We went to Paris together. We ought to help. Let's go. We need to talk to Mark. We won our football game. — People in general. We need to think about other people more.

we Determiner

— The person speaking and other people with him or her. We Canadians don't act that way.

need Verb

— If you need something, you want it and must have it. Everyone needs food and water. — If you need to do something, it is very important that you do it. Sir, you need to leave now.

need Verb

— If you need do something, you have to do it. Need you do that all the time? You needn't keep telling me. I heard you the first time.

need Noun

— If you have a need for something, you must have it; something necessary or required. I've always tried to have few needs beyond food, clothing and shelter.

a Determinative

— A is used when the following word could be any of a certain type. Compare "A book I saw on the shelf" and "The book I gave you yesterday".

a Noun

— A is the first letter of the alphabet. The letter "a" comes before "b". — In some schools, an A is a very high grade. Ron got an A on his earth science test.

plan Noun

— A plan is a clear idea of what you will do, often for a particular goal. Have you made any plans for tomorrow? The school has announced a plan to open two new classrooms. Buying the new factory is part of our growth plan. — A plan is a technical drawing of a room, a building, a city, etc. The plans show this area as housing, with no shopping nearby.

plan Verb

— If you plan something, you decide what you will do. We need to plan ahead so that we'll be ready. We planned out the wedding very carefully. I didn't plan to be here, but John asked me to come. When do you plan on starting the new job?