Recognizing "postpone" in a reading passage is different from using it when your group needs a new meeting date. Close your notes and explain that situation in one sentence: "We need to postpone the meeting because the room is unavailable."
Then change the situation. "The outdoor concert was postponed until Sunday" uses the word in a different context and structure. Check the examples against a reliable learner reference when you are uncertain about the surrounding words.
Keep meaning and use together
Contrast the target with a nearby word. Canceling a meeting means it will not take place as arranged; postponing it moves it to a later time. A later replacement event may exist after a cancellation, so examine the actual message rather than memorizing an oversimplified universal rule.
Create a question that invites retrieval: "What happened when the speaker became unavailable?" Answer later without displaying the target word. This gives you better evidence than looking at the word and feeling that it seems familiar.
If you cannot retrieve it, use a clear description such as "move it to a later day," then check and retry. Keep the exercise connected to situations you might encounter. The aim is flexible access to useful language, with an alternative explanation available when the precise word does not come immediately, rather than a large list you can recognize only while reading it.