Fuller (?), n. [AS. fullere, fr. L. fullo. See Full, v. t.] One whose occupation is to full cloth.
[1913 Webster]

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 Fuller's weed (Bot.), the teasel (Dipsacus fullonum) whose burs are used by fullers in dressing cloth. See Teasel.
[1913 Webster]

Fuller, v. t. To form a groove or channel in, by a fuller or set hammer; as, to fuller a bayonet.
[1913 Webster]