Definition of Evasive

Tending or seeking to evade; elusive; shifting; as an evasive argument or plea. If a pleading to which a responsive pleading is required is evasive, a party may make motion for a more definite statement. Fed.R.Civil P. 12(e).

That's the definition of Evasive in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.