I asked because the Platinum Card entry benefit at AA, DL and US lounges does not mention "immediate family", it is very specific:
http://exploreplatinum.americanexpre...enefits/Travel
...but some individual lounges which participate in Priority Pass may use that terminology to limit the number of people who enter.
So if the nieces and nephews are under 21, they qualify as "children" since it didn't say the "cardholder's children" specifically?