Hello friend, Instagram is not an English word, but the English trademark name of a picture sharing software. But we can scrutinize the meaning of the English in this trademark name:

The name of Instagram is taken from the combination of the two words "instant" (English: instant) and "telegram" (English: telegram). Because the founder was inspired by instant imaging cameras and believed that sharing photos between people was "like transmitting telegraph messages over wires," he combined the two words into the name of the software.

Instagram is a social application that provides free online picture and short video sharing. It was released in October 2010. It allows users to take photos with their smartphones and then add different filter effects to the photos, and then share them to social network services such as Facebook, Twitter, Tumblr and Flickr, or to Instagram's servers.

I hope the above information is helpful to you, remember to accept the satisfactory answer~ I wish you all the best?:-)

(Picture source: Wikipedia)