You missed very important words. A blockchain is (by your own definition) a "distributed ledger". Given you like Wikipedia so much, here's their definition of

You missed very important words. A blockchain is (by your own definition) a "distributed ledger". Given you like Wikipedia so much, here's their definition of what a ledger is (https://en.wikipedia.org/wiki/Ledger https://en.wikipedia.org/wiki/Ledger) > A ledger is a book or collection of accounts in which account transactions are recorded. You'll find similar definitions on non-Wikipedia sources as well. Thus, if it doesn't have accounts and transactions between them, it isn't a ledger and thus isn't a blockchain.