tache UK /tɑːʃ/US /tæʃ/ noun3 •(informal) Moustache, mustache. •Something used for taking hold or holding; a catch, loop, button.And thou shalt make fiftie taches of gold, and couple the curtaines together with the taches: and it shall be one tabernacle. — 1611 •(no longer used) A spot, stain, or blemish.Alone I cared for our mother who did little else but stare at taches on floor and ceiling. — 1993 formstaches