waw

noun2

1. •
   (dialect, Scotland) A wall.

   • She hath been at London to call a strea a straw, and a waw a wall. — 1678
2. •
   (no longer used) A wave.

   • […] nigh it drawes All passengers, that none from it can shift: For whiles they fly that Gulfes deuouring iawes, They on this rock are rent, and sunck in helplesse wawes. — 1590

verb1

1. •
   (no longer used) To stir; move; wave.

noun1

1. •
   The twenty-seventh letter of the Arabic alphabet: و.

noun2

1. •
   Initialism of writing about writing.
2. •
   Initialism of write after write, a kind of data hazard.