One who is alone or unaccompanied, as an only child or unmarried person. Also spec. an undercover agent who operates alone.
| 单词 | θ129836 |
| 释义 | the mind > attention and judgement > enquiry > investigation, inspection > secret observation, spying > [noun] > a secret observer, spy > secret agent > operating alone (1) singleton1977 One who is alone or unaccompanied, as an only child or unmarried person. Also spec. an undercover agent who operates alone. |
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