elfin (adj.)suggestive of an elf in strangeness and otherworldliness; "the fey quality was there, the ability to see the moon at midday"- John Mason Brown;
thunderbolts quivered with elfin flares of heat lightning
elfin (adj.)small and delicate;
she was an elfin creature--graceful and delicate
obsessed by things elfin and small
Synonyms: elflike
elfin (adj.)relating to or made or done by or as if by an elf;
all the little creatures joined in the elfin dance
elfin (adj.)usually good-naturedly mischievous;
perpetrated a practical joke with elfin delight