Synonym: acquire, attach, close, fasten, firm, fix, get, lock, obtain, safe, seal, shut, sound, stable, sure. Antonym: anxious. Similar words: security, secular, persecute, recurrent, prosecutor, consecutive, prosecution, sec.. Meaning: [sɪ'kjʊr /-'kjʊə] 
v. 1. get by special effort 2. cause to be firmly attached 3. assure payment of 4. make certain of 5. fill or close tightly with or as if with a plug 6. furnish with battens. adj. 1. free from fear or doubt; easy in mind 2. free from danger or risk 3. kept safe or defended from danger or injury or loss 4. not likely to fail or give way 5. able to withstand attack 6. financially sound.
v. 1. get by special effort 2. cause to be firmly attached 3. assure payment of 4. make certain of 5. fill or close tightly with or as if with a plug 6. furnish with battens. adj. 1. free from fear or doubt; easy in mind 2. free from danger or risk 3. kept safe or defended from danger or injury or loss 4. not likely to fail or give way 5. able to withstand attack 6. financially sound. 
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181 If you're paid in advance for something, you secure your future.
More similar words: security, secular, persecute, recurrent, prosecutor, consecutive, prosecution, sec., incur, execute, sector, second, insect, occur, curio, curve, molecule, section, speculate, execution, executive, in secret, curious, curtain, current, secretary, secondary, accuracy, accurate, currency.