secure in WordNet English dictionary

1. make certain of
   "This nest egg will ensure a nice retirement for us"; "Preparation will guarantee success!"
   guarantee  ensure  insure  assure  secure 
   
2. furnish with battens
   "batten ships"
   batten  batten down  secure 
   
3. cause to be firmly attached
   "fasten the lock onto the door"; "she fixed her gaze on the man"
   fasten  fix  secure 
   
4. fill or close tightly with or as if with a plug
   "plug the hole"; "stop up the leak"
   plug  stop up  secure 
   
5. get by special effort
   "He procured extra cigarettes even though they were rationed"
   procure  secure 
   
6. assure payment of
   secure 
   

1. financially sound
   "a good investment"; "a secure investment"
   dependable  good  safe  secure 
   
2. immune to attack; incapable of being tampered with
   "an impregnable fortress"; "fortifications that made the frontier inviolable"; "a secure telephone connection"
   impregnable  inviolable  secure  strong  unassailable  unattackable 
   
3. free from fear or doubt; easy in mind
   "he was secure that nothing will be held against him"
   secure  unafraid  untroubled 
   
4. free from danger or risk
   "secure from harm"; "his fortune was secure"; "made a secure place for himself in his field"
   secure 
   
5. not likely to fail or give way
   "the lock was secure"; "a secure foundation"; "a secure hold on her wrist"
   secure