secure secure /sɪˈkjʊr/

adjective

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

verb

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