6. (n.)auxiliary a person or thing that gives aid; helper.
7. auxiliary a subsidiary organization allied with a main body of restricted membership: the women's auxiliary.
8. auxiliary auxiliaries, foreign troops in the service of a nation at war.
9. auxiliary a naval vessel, as a supply ship, designed for other than combat purposes.
Etymology: (1595–1605; < L auxiliārius assisting <auxilium aid <auxsis, ptp. of augēre to increase, augment)
Definition of 'auxiliary'
Princeton's WordNet
1. (adj)aide, auxiliary someone who acts as assistant
2. (adj)auxiliary, subsidiary, supplemental, supplementary functioning in a supporting capacity "the main library and its auxiliary branches"
3. (adj)accessory, adjunct, ancillary, adjuvant, appurtenant, auxiliary furnishing added support "an ancillary pump"; "an adjuvant discipline to forms of mysticism"; "The mind and emotions are auxiliary to each other"
Definition of 'auxiliary'
Webster Dictionary
1. (adj)auxiliary conferring aid or help; helping; aiding; assisting; subsidiary; as auxiliarytroops
2. (noun)auxiliary a helper; an assistant; a confederate in some action or enterprise
3. (noun)auxiliary foreign troops in the service of a nation at war; (rarely in sing.), a member of the allied or subsidiaryforce
4. auxiliary a verb which helps to form the voices, modes, and tenses of other verbs; -- called, also, an auxiliary verb; as, have, be, may, can, do, must, shall, and will, in English; etre and avoir, in French; avere and essere, in Italian; estar and haber, in Spanish
5. auxiliary a quantity introduced for the purpose of simplifying or facilitating some operation, as in equations or trigonometrical formulae
Definitions of auxiliary 
Afrikaans: hulp
Arabic: مُساعِد، إضافي
Bulgarian: помощен
Brazilian: auxiliar
Czech: (vý)pomocný
German: Hilfs-...
Danish: hjælpe-; støtte-
Greek: βοηθητικός, εφεδρικός
Spanish: auxiliar
Estonian: abi-, lisa-
Farsi: کمکی؛ اضافی
Finnish: avustava
French: auxiliaire
Hebrew: מְסַייֵע, עוֹזֵר
Hindi: सहायक
Croatian: pomoćni
Hungarian: segéd-
Indonesian: darurat
Icelandic: aðstoðar-, hjálpar-
Italian: ausiliare
Japanese: 補助の
Korean: 보조의
Lithuanian: pagalbinis
Latvian: palīg-; papildu
Malay: tambahan
Dutch: hulp-
Norwegian: hjelpe-, støtte-
Polish: pomocniczy
Persian: کمکی؛ اضافی
Pashto: کمکی ، اضافی
Portuguese: auxiliar
Romanian: auxiliar
Russian: вспомогательный; дополнит
Slovak: výpomocný
Slovenian: pomožen
Serbian: pomoćni
Swedish: hjälp-, reserv-, extra-
Thai: เสริม; หนุน
Turkish: yardımcı
Taiwanese: 輔助的
Ukrainian: допоміжний; додатковий
Urdu: اضافی ، سود مند ،
Vietnamese: bổ trợ
Chinese: 辅助的
