single

Only one, and not more than one.

• She didn't say a single word all evening.
  Bütün akşam tek kelime etmedi.
• A single mistake can ruin the whole test.
  Tek bir hata bütün testi mahvedebilir.

Not married, or not having a romantic relationship.

• She has been single since she moved to the city.
  Şehre taşındığından beri bekâr.
• Is your brother still single, or does he have a girlfriend?
  Erkek kardeşin hâlâ bekâr mı, yoksa kız arkadaşı var mı?

Made for or used by one person.

• I'd like to book a single room for two nights.
  İki gece için tek kişilik bir oda ayırtmak istiyorum.
• The children's room has two single beds.
  Çocuk odasında iki tek kişilik yatak var.

Used in 'every single' and 'not a single' to emphasize what you are saying.

• He visits his mother every single day.
  Annesini istisnasız her gün ziyaret ediyor.
• Not a single person came to the meeting.
  Toplantıya tek bir kişi bile gelmedi.

Bringing up a child or children without a husband, wife or partner.

• Being a single parent is not easy.
  Tek ebeveyn olmak kolay değil.
• She is a single mother with two children.
  İki çocuğunu tek başına büyüten bir anne.