'Burnt offering' in the Bible

Then it shall be, that whatever cometh out of the doors of my house to meet me, when I return in peace from the children of Ammon, shall surely be the LORD'S, and I will offer it for a burnt-offering.

And the angel of the LORD said to Manoah, Though thou shouldst detain me, I will not eat of thy bread: and if thou wilt offer a burnt-offering, thou must offer it to the LORD. For Manoah knew not that he was an angel of the LORD.

But his wife said to him, If the LORD were pleased to kill us, he would not have received a burnt-offering and a meat-offering at our hands, neither would he have showed us all these things, nor would, as at this time, have told us such things as these.