English: brownfield site
Welsh: safle tir llwyd
Subject: Cynllunio
English definition: Land which has been previously developed, excluding mineral workings or other temporary uses.
Welsh definition: Tir a gafodd ei ddatblygu'n flaenorol, heblaw am waith mwynau neu ddefnydd dros dro arall.
Plural: safleoedd tir llwyd