a.

1. 安全的，无危险的[（+from/against）]
   Now my house is secure against burglary.

   现在我的房子无被盗窃的危险。

2. 安心的，无忧虑的[（+about）]
   You have made me feel secure.

   你使我觉得放心。

3. 有把握的，确定无疑的[（+of）]
   Our success is secure.

   我们的成功是有把握的。

4. 牢固的；稳当的；牢靠的
   His place in history is now secure.

   他在历史上的地位现在已经稳固了。

5. 被妥善保管的；被拘留的

vt.

1. 把……弄牢；关紧
   He secured all the windows before he left.

   他走之前关紧了所有的窗户。

2. 使安全；掩护；保卫[（+from/against）]
   Some measures are needed to secure the farmland against shifting sand.

   需要采取措施使农田免遭流沙的侵袭。

3. 弄到，获得；替……弄到[（+for）][O1]
   He secured a position in a store at US$400 a week.

   他在一家商店获得了一份每周四百美元的工作。

4. 保证；为（借款等）作保；向（债权人）提供保证
5. 引起，招致
   His words secured his father's displeasure.

   他的话招致他父亲的不悦。

6. 拘留，监禁

vi.

1. 获得安全；变得安全[（+against）]
   It is highly necessary to secure against the dangers of the coming typhoon.

   预防即将来临的台风的危险很有必要。

   You must order your tickets early to secure against disappointment!

   你必须早点订购票子以防失望！

2. 【海】（船上人员）停止工作
3. 【海】停靠码头；抛锚

adj.

1. fixed or fastened so as not to give way, become loose, or be lost.
2. certain to remain safe and unthreatened.
   ▸protected against attack or other criminal activity.
3. feeling free from fear or anxiety.
   ▸ (secure of) dated feeling no doubts about attaining.
4. (of a place of detention) having provisions against the escape of inmates.

v.

1. fix or fasten securely.
2. protect against threats.
3. succeed in obtaining.
   ▸seek to guarantee repayment of (a loan) by having a right to take possession of an asset in the event of non-payment.
4. Surgery  compress (a blood vessel) to prevent bleeding.