::::::Thanks for your comments. Looking for better sources. People don't usually define what they think everyone understands and discusses, per all other articles quoted.  
 ::::::Meanwhile, considering current first sentence: The Israel lobby in the United Kingdom is described as “the array of pro-Israel organisations in Britain” engaged in pro-Israel lobbying - This is where WP:OR gets confusing.  The two relevant sentences this is drawn from are: When one looks at the array of pro-Israel organisations in Britain, one is struck not by their cohesion so much as their fragmentation. And ...Rupert Murdoch has business interests in Israel and would "fly into hysterical terror every time a pro-Israel lobbying group wrote in with a quibble".  Since the whole article is about the Israel lobby in UK, using various phrases, why isn't this intro sentence summarizing those two sentences just a legit summary?  Thanks. Carol Moore