We have taken many 'defensive' measures [=we have done things to protect ourselves] against terrorist attacks.
The team needs to improve its game 'defensively'. [=it needs to make its defense better]
He found himself 'on the defensive' when the subject of the environment was discussed.
(..) That we hit first and hit hard and leave a feast for the crows. A smart commander does not abandon a defensive advantage. Not to mention that the snow is so deep, we couldn't get an army through to engage them even if we wanted to. (..)2015 TvShow: Game of Thrones Title: Hardhome Season: 5 Episode 8