mothball meaning
Definitions &Translations Wiktionary (0.00 / 0 votes) Rate this definition: mothball (Noun) a small ball of chemical pesticide and deodorant placed in or around clothing and other articles susceptible to damage from mold or moth larvae in order to protect them from this damage; mothballs have either naphthalene or paradichlorobenzene as their active ingredient. mothball (Verb)