ok, so when i read Litecoin is a fork of Bitcoin, it does not mean, that it started as a orphan block out ot BTC chain?
it is a different meaning for "fork"?
There is a Bitcoin source fork and a blockchain fork, "fork" usually means the latter as far as I know it. Litecoin didn't start out as an orphan block from the BTC chain, it has its own genesis block and premined coins.