What does "lock time" mean? I got a transaction that is still not confirmed for about one week, and I can see a field called "Lock Time" that says:

Lock Time Block: 419382
https://blockchain.info/en/tx/ea445ae61c2906d43f8f8d73cfef2caefe3d63ae504da31a6a829cc35527faf6

What does that mean and how long do I have to wait until my transaction gets confirmed?
A specified locktime indicates that the transaction is only valid after a given blockheight.
Since the locktime field indicated is 419382 and currently the latest blockheight as of 12th July 2016 1108 (AEST) is 420352 the transaction is now valid and can be included in a block by any miner that chooses to do so.