adjective

(of a sight, smell, or sound) barely perceptible.

the faint murmur of voices

indistinct,vague,unclear,indefinite,ill-defined,obscure,imperceptible,hardly noticeable,hardly detectable,unobtrusive,pale,light,faded,bleached,quiet,muted,muffled,stifled,subdued,feeble,weak,thin,whispered,murmured,scarcely audible,scarcely perceptible,hard to hear,hard to make out,low,soft,gentle

verb

lose consciousness for a short time because of a temporarily insufficient supply of oxygen to the brain.

I fainted from loss of blood

pass out,lose consciousness,fall unconscious,black out,collapse,flake out,keel over,conk out,zonk out,drop,go out,go out like a light,swoon

noun

a sudden loss of consciousness.

she hit the floor in a dead faint

blackout,fainting fit,loss of consciousness,collapse,coma,swoon,syncope