“We made tentative plans to meet next Wednesday.”
You've been making plans to meet a woman that you met on an online dating site. You've both agreed that next Wednesday is the best day, but you haven't chosen the exact time or location. You think that there's a possibility that she might change the plans to a different day. Now you're telling your friend about this and you say this.
We made tentative plans to meet next Wednesday.
A plan that is "tentative" hasn't been completely decided yet. You might still change your plan later if it's "tentative".
Some other things that you can describe as "tentative" are:
- reach a tentative agreement
- come to a tentative conclusion
To "make plans" means to plan what you're going to do with someone on a certain day and time. This is the meaning of "plans" with an -s at the end. For example:
Do you have plans for this weekend?
The meaning of this is different from "a plan". "A plan" is an idea for how you're going to do something. Here's an example:
Do you have a plan for what you'll do if you get laid off?
Tell what you're going to do using "plans to ___":
We made plans to meet in a Starbucks at 7:30.
Tell when the plans are using "plans for ___":
I don't have any plans for Thursday. Do you?