Entry 1 sense Webster, 1913 Sunk /sŭngk/ · IPA /sʌŋk/ 01 imp. & p. p. imp. & p. p. of Sink. 1. imp. & p. p. of Sink. See: Sink Phrases & compounds Sunk fence — a ditch with a retaining wall, used to divide lands without defacing a landscape; a ha-ha.