1. a lot - Adverb
2. a lot - Pronoun
to a very great degree or extent
Source: WordNetIn the old days, people knew a little and understood a lot. Then they gained more knowledge which led to less understanding. And now people know a lot but understand nothing at all. John Krestiankin
I don't know who invented high heels, but all women owe him a lot. Marilyn Monroe
I spent a lot of money on booze, birds and fast cars. The rest I just squandered. George Best
Those who talk a lot start lying. Bengali Proverb
A poor person isn't he who has little, but he who needs a lot. German Proverb
He who speaks a lot learns little. Armenian Proverb