I just want to know meaning of " Blueprint " word. Some websites say it's a method of printing, some say it just means pattern or design used by engineers or architects to document their ideas. I am really confused. Can someone explain me the real intend and meaning behind blueprint word? If someone could,i would be much appreciated.

I just want to know the meaning of blueprint. 

Some websites say it's a method of printing, some say it merely means a pattern or design used by engineers or architects to document their ideas. 

I am really confused. Can someone explain to me the basic intention and meaning that underpins this word? If so, it would be much appreciated.

I just want to know meaning of " Blueprint " word.Some websites say it's a method of printing,some say it just means pattern or design used by engineers or architects to document their ideas.I am really confused.Can someone explain me the real intend and meaning behind blueprint word?If someone could,i would be much appreciated.

Thanks.

I just want to know meaning of " Blueprint " word. Some websites say it's a method of printing, some say it just means pattern or design used by engineers or architects to document their ideas. I am really confused. Can someone explain me the real intend and meaning behind blueprint word? If someone could,i would be much appreciated.