the Blue Nile one of the two rivers that form the River Nile. It starts in Ethiopia in East Africa, and flows north to Khartoum in Sudan, where it joins the White Nile.
a children's programme that has been on British television since the late 1950s. It is known for encouraging children to collect money or things for people who are poor or sick, and for showing them how to do and make useful things.
the Blue Ridge Mountains the part of the APPALACHIANS (= a group of mountains in the eastern US) that goes from southern Pennsylvania to northern Georgia