(bases)
Frequency: The word is one of the 1500 most common words in English.
1.
If something is done on a particular ~, it is done according to that method, system, or principle.
We’re going to be meeting there on a regular ~...
They want all groups to be treated on an equal ~...
I’ve always worked on the ~ that if I don’t know anything technical I shan’t be any worse off.
N-SING: with supp, usu on N
2.
If you say that you are acting on the ~ of something, you are giving that as the reason for your action.
McGregor must remain confined, on the ~ of the medical reports we have received...
N-SING: on N, oft N of n, N that
3.
The ~ of something is its starting point or an important part of it from which it can be further developed.
Both factions have broadly agreed that the UN plan is a possible ~ for negotiation.
...the sub-atomic particles that form the ~ of nearly all matter on earth.
= foundation
N-COUNT: usu sing, usu N for/of n
4.
The ~ for something is a fact or argument that you can use to prove or justify it.
...Japan’s attempt to secure the legal ~ to send troops overseas...
This is a common fallacy which has no ~ in fact.
N-COUNT: usu sing