“fuller” – English explanatory dictionary

n. [AS. fullere, fr. L. fullo. See Full, v. t.] One whose occupation is to full cloth. Fuller’s earth, a variety of clay, used in scouring and cleansing cloth, to imbibe grease. — Fuller’s herb (Bot.), the soapwort (Saponaria officinalis), formerly used to remove stains from cloth. — Fuller’s thistle or weed (Bot.), the teasel (Dipsacus fullonum) whose burs are used by fullers in dressing cloth. See Teasel.

n. [From Full, a.] (Blacksmith’s Work) A die; a half- round set hammer, used for forming grooves and spreading iron; — called also a creaser.

v. t. To form a groove or channel in, by a fuller or set hammer; as to fuller a bayonet.