This is my dig at it, blockchain novice here too. :)
Blockchain is a digital ledger database based on distributed network. The database is not managed by any particular body; instead, everyone in the network gets a copy of the whole database. A ledger is a record that keeps track of transactions, put crudely. Bitcoin is merely an implementation of the blockchain technology. Let’s understand this through a practical scenario, let's look at Bitcoin. These are 2 people and they need to transfer money between them. In the current system of payments, this is done with the help of a trusted third party like your bank or PayPal. The blockchain technology eliminates the need for the third party, since the distributed network acts like the third party.