pro|tec|tive [prəˈtektıv] adj
1.) [only before noun]
used or intended for protection
protective clothing
Sunscreen provides a protective layer against the sun's harmful rays.
2.) wanting to protect someone from harm or danger
protective towards
I can't help feeling protective towards my kids.
protective of
He's very protective of his younger brother.
3.) intended to give an advantage to your own country's industry
protective tariffs
>protectively adv
>protectiveness n [U]

Dictionary of contemporary English. 2013.