Large indefinite quantity and Upper limit

Large indefinite quantity noun - An indefinite quantity that is above the average in size or magnitude.

Upper limit and large indefinite quantity are semantically related. In some cases you can replace phrase "Upper limit" with "Large indefinite quantity", this phrases are similar.

Upper limit noun - The largest possible quantity.

Large indefinite quantity and upper limit are semantically related. Sometimes you can use "Large indefinite quantity" instead a noun phrase "Upper limit".