Definition of "fettle"

A state of physical condition; kilter or trim.  quotations  examples

One's mental state; spirits.  examples

Sand used to line a furnace.  examples

(ceramics) A seam line left by the meeting of mould pieces.  examples

(UK, dialectal) The act of fettling.  examples

(Cumbria, Tyneside) A person's mood or state, often assuming the worst.  examples

(especially Northern England) To sort out, to fix, to mend, to repair.  quotations  examples

(intransitive) To make preparations; to put things in order; to do trifling business.  quotations  examples

(transitive) To line the hearth of a furnace with sand prior to pouring molten metal.  examples

(reflexive, Tyneside) To be upset or in a bad mood.  examples

In ceramics, to remove (as by sanding) the seam lines left by the meeting of two molds.  examples

(transitive, archaic) To prepare.  quotations