Tab \Tab\, n. [Etymol. uncertain.]

1. The flap or latchet of a shoe fastened with a string or a buckle.

2. A tag. See Tag, 2.

3. A loop for pulling or lifting something.

4. A border of lace or other material, worn on the inner front edge of ladies' bonnets.

5. A loose pendent part of a lady's garment; esp., one of a series of pendent squares forming an edge or border.

Source: Webster's Revised Unabridged Dictionary (1913)