Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Like a thief; thievish.
  • adv. Like a thief; thievishly.

from the GNU version of the Collaborative International Dictionary of English

  • Like a thief; thievish; thievishly.

from The Century Dictionary and Cyclopedia

  • Like a thief; hence, stealthily; secretly.

Etymologies

thief +‎ -ly (Wiktionary)

Examples

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