(uncountable) The chemical element (symbol F) with an atomic number of 9. It is the lightest of the halogens, a pale yellow-green, highly reactive gas that attacks all metals.

A pipe or duct that carries gaseous combustion products away from the point of combustion (such as a furnace). / An enclosed passageway in which to direct air or other gaseous current along.

(UK, dialect) Alternative form of flew (“shallow, flat”)

(anatomy) Any liquid portion of the body, such as blood, urine, semen, saliva, especially when expelled.

The act of flowing; a continuous moving on or passing by, as of a flowing stream. / A state of ongoing change. / A chemical agent for cleaning metal prior to soldering or welding.

(transitive) To use flux on. / (transitive) To melt. / (intransitive) To flow as a liquid.

(uncommon) Flowing; unstable; inconstant; variable.

That flows; flowing, liquid. / (linguistics) Able to use a language accurately, rapidly, and confidently – in a flowing way.

(mathematics, obsolete) A continuous variable, especially one with respect to time in Newton's Method of Fluxions.

Covered with fluff. / Light; soft; airy. / (colloquial) Warm and comforting. / (colloquial) Not clearly defined or explained; fuzzy. / Lightweight; superficial; lacking depth or seriousness.