Definition of "smug"

smug

/smʌɡ/

adjective
comparative smugger, superlative smuggest
1. Irritatingly pleased with oneself; offensively self-complacent, self-satisfied.
2. Showing smugness; showing self-complacency, self-satisfaction.
3. (obsolete) Studiously neat or nice, especially in dress; spruce; affectedly precise; smooth and prim.
  Quotations
  They be so smug and smooth.
  1556, Raphe Robynson, More’s Utopia: The English Translation thereof
  the smug and scanty draperies of his style
  1828, Thomas De Quincey, “Elements of Rhetoric”, in Blackwood's Magazine
  A young, smug, handsome holiness has no fellow.
  c. 1621, John Fletcher, Philip Massinger, “The Pilgrim”, in Comedies and Tragedies […], London: […] Humphrey Robinson, […], and for Humphrey Moseley […], published 1647, Act I, scene ii
verb
third-person singular simple present smugs, present participle smugging, simple past and past participle smugged
1. (obsolete, transitive) To make smug, or spruce.
  Quotations
  Thus said, he smug'd his beard, and stroked up fair.
  1612, Michael Drayton, “(please specify the chapter)”, in [John Selden], editor, Poly-Olbion. Or A Chorographicall Description of Tracts, Riuers, Mountaines, Forests, and Other Parts of this Renowned Isle of Great Britaine, […], London: […] H[umphrey] L[ownes] for Mathew Lownes; I. Browne; I. Helme; I. Busbie, published 1613
2. (obsolete, transitive, slang) To seize; to confiscate.
3. (obsolete, transitive, slang) To hush up.