D defs.my
Entry 3 senses Webster, 1913

Rounder

/roun'-dẽr/ · Round·er · IPA /ˈɹaʊndə(ɹ)/
01 n. One who rounds; one who comes about frequently or regularly.
  1. 1.
    One who rounds; one who comes about frequently or regularly.
  2. 2.
    A tool for making an edge or surface round.
  3. 3.
    An English game somewhat resembling baseball; also, another English game resembling the game of fives, but played with a football.
    “Now we play rounders, and then we played prisoner's base.” — Bagehot.