1. (n.)reptile any air-breathing vertebrate of the class Reptilia, characterized by a three-chambered heart, a completely bony skeleton, and a covering of dry scales or horny plates: includes the snakes, lizards, turtles, crocodilians, and various extinct forms.
2. reptile (loosely) any of various animals that crawl or creep.
3. reptile a groveling, mean, or despicable person.
4. (adj.)reptile groveling, mean, or despicable.
Etymology: (1350–1400; ME reptil < LL rēptile, n. use of neut. of rēptilis creeping = L rēp(ere) to creep) +-tilis -tile)
Definition of 'reptile'
Princeton's WordNet
1. (noun)reptile, reptilian any cold-blooded vertebrate of the class Reptilia including tortoises, turtles, snakes, lizards, alligators, crocodiles, and extinct forms
Definitions of reptile 
Afrikaans: reptiel
Arabic: زاحِف
Bulgarian: влечуго
Brazilian: réptil
Czech: plaz
German: das Reptil
Danish: krybdyr; reptil
Greek: ερπετό
Spanish: reptil
Estonian: roomaja
Farsi: خزنده
Finnish: matelija
French: reptile
Hebrew: זוֹחֵל
Hindi: कीड़ा
Croatian: gmaz, reptil
Hungarian: csúszómászó
Indonesian: reptil
Icelandic: skriðdÿr
Italian: rettile
Japanese: は虫類
Korean: 파충류
Lithuanian: roplys
Latvian: reptilis; rāpulis
Malay: reptilia
Dutch: reptiel
Norwegian: krypdyr
Polish: gad
Persian: خزنده
Pashto: خزنده (مار، نهنګ ياچرمښكى
Portuguese: réptil
Romanian: reptilă
Russian: рептилия
Slovak: plaz
Slovenian: plazilec
Serbian: reptil
Swedish: reptil, kräldjur
Thai: สัตว์เลื้อยคลาน
Turkish: sürüngen
Taiwanese: 爬行動物，爬蟲
Ukrainian: плазун, рептилія
Urdu: رینگنے والا جانور
Vietnamese: loài bò sát
Chinese: 爬行动物
