The answer to this could be tricky. The context will determine the answer based on the definitions below. For purposes of answering your question, I will restrict myself to the two main definitions of "lot". 1 - many, a significant number of items. "There are a lot of raindrops in a bucket of water." 2 - a single group of a particular item, usually in a standard number or size "A standard lot of paper consists of 20 boxes each consisting of 10 reams of paper (a ream is 500 sheets of paper; and I really do not know how large a lot of paper is!). ". The second definition is most often a commercial term used primarily between businesses or in financial markets to define standard sizes. So, depending on how you use your terms, you can generate different meanings. One lot of paper. A lot of paper. Both of these could mean a single lot of paper using definition 2. A lot of paper could also mean a large amount of paper using definition 1. Most typically, "a lot of" is used to describe things using definition 1 and "one lot of" is used to describe things with definition 2. Finally, in everyday conversation, definition 1 is used far, far more frequently (or a lot more frequently) than definition 2.

In conversational use "one lot of" is an intensified form of a lot of. Both mean "many" but "one lot of" means more than "a lot of." a lot of : many one lot of : many, many, many!

a lot of = many one lot of = literally "one lot" Look of the noun "lot" in the dictionary. It's a collection of just about anything.