adjective. 1. serving, made, formed, etc for defence, pertahanan: a defensive weapon, senjata pertahanan; a defensive strategy, strategi pertahanan; a defensive alliance, perikatan pertahanan; defensive policy, dasar pertahanan; 2. (of person), (bersikap! mempertahankan diri: she became very defensive when I asked her if she had seen my purse, dia bersikap mempertahankan diri apabila saya bertanya sama ada dia ternampak dompet saya; noun.; be on the defensive, bersikap mempertahankan diri: in every argument we've had, he was always on the defensive, setiap kali kami berdebat, dia selalu bersikap mempertahankan diri.