variante(s): fos, foutz, foz

n. f.

a. 'goulet, entrée chenal, source ou passage étroit, gorge'

D: 1155 Rouergue ⊂ ChartPrB₂ 360,5 (‑z); 1178 Rouergue ⊂ ChartPrB₂ 423,7 (‑z); 1258 ⊂ GNO 177b (fos); 1398 ⊂ GNO 177b (fos); 1451 ⊂ GNO 177b (fos)

b. 'source'

L: SHonS 247 (foutz)

c. a f. 'à flots'

L: SÉnimB 523 (ms. fons)

FEW 3:439a [ꜰᴀᴜx]. – Thomas₂₆ 100–101.