1. (n.)vermin noxious or objectionable animals collectively, esp. those of smallsize that appear commonly and are difficult to control, as flies, lice, cockroaches, and rats.
2. vermin an objectionable or obnoxious person, or such persons collectively.
3. vermin animals that prey upon game, as coyotes.
Etymology: (1300–50; < MF vermin(e) < L vermināre to be infested with maggots, to have racking pains)
Definition of 'vermin'
Princeton's WordNet
1. (noun)vermin, varmint an irritating or obnoxious person
2. (noun)vermin any of various small animals or insects that are pests; e.g. cockroaches or rats "cereals must be protected from mice and other vermin"; "he examined the child's head for vermin"; "boys in the village have probably been shooting vermin"
2. vermin a noxious or mischievous animal; especially, noxious little animals or insects, collectively, as squirrels, rats, mice, flies, lice, bugs, etc
3. vermin hence, in contempt, noxious human beings
Sense: undesirable or troublesome pests such as fleas, rats, or mice Farmers are always having trouble with various types of vermin; It is vermin such as these men that are trying to destroy society.
Definitions of vermin 
Afrikaans: plaagdiere
Arabic: هوام، حَشَرات طُفَيْلِيَّ
Bulgarian: вредители
Brazilian: parasita
Czech: havěť
German: das Ungeziefer
Danish: skadedyr
Greek: βλαβερά ζώα, παράσιτα, κα
Spanish: parásito; chusma, gentuza
Estonian: kahjurid
Farsi: جانور موذی
Finnish: tuhoeläimet
French: vermine
Hebrew: מַזִיקִים
Hindi: कीड़े-मकोड़े
Croatian: štetočina
Hungarian: férgek
Indonesian: hama
Icelandic: meindÿr
Italian: parassita
Japanese: 害虫
Korean: 해충, 해로운 동물
Lithuanian: kenkėjai, parazitai
Latvian: parazīti; (par cilvēkiem)
Malay: binatang perosak
Dutch: ongedierte, gespuis
Norwegian: skadedyr, utøy
Polish: robactwo, szkodniki
Portuguese: parasita
Romanian: insecte dăunătoare; para
Russian: паразиты; вредители
Slovak: škodci; háveď
Slovenian: golazen
Serbian: štetočina
Swedish: skadedjur, ohyra
Thai: พยาธิหรือสัตว์ที่เป็นอันต
Turkish: haşarat, zararlı hayvan
Taiwanese: 害蟲，害獸，害鳥
Ukrainian: шкідники, паразити
Urdu: ضرر رساں کيڑے
Vietnamese: vật hại, sâu hại
Chinese: 寄生虫，害虫，害鸟
