no Brasil, padrão, sem dúvida alguma

P.

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Note added at 2 hrs (2010-02-22 20:30:23 GMT)
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pt-br
default padrão A value that is automatically used by a program when the user does not specify an alternative. Defaults are built into a program when a value or option must be assumed for the program to function.
by default por padrão How a program's action is determined if the user does not make a choice or supply a required value.
default font fonte padrão The font that a program uses by default to display text.
default role função padrão A setting associated with a particular user role. Users who are not assigned to an existing role are automatically assigned to the role that is specified as the default.
default unit unidade padrão The unit of measure used to display a value if no units of measure are explicitly specified.
default user usuário padrão The profile that serves as a basis for all user profiles. Every user profile begins as a copy of the default user profile.
default zone zona padrão The zone to which all Macintosh clients on the network are assigned by default.
default name nome padrão The name automatically assigned to an object by a program or process when the user does not specify an alternative.
default skin aparência padrão A control skin that automatically applies to all controls of the same type when a theme is applied to a page.
default value valor padrão A value that is automatically entered in a field or control when you add a new record. You can either accept the default value or override it by typing a value.

pt-pt
default predefinição A value that is automatically used by a program when the user does not specify an alternative. Defaults are built into a program when a value or option must be assumed for the program to function.
by default por predefinição How a program's action is determined if the user does not make a choice or supply a required value.
default role função predefinida A setting associated with a particular user role. Users who are not assigned to an existing role are automatically assigned to the role that is specified as the default.
default unit unidade predefinida The unit of measure used to display a value if no units of measure are explicitly specified.
default font tipo de letra predefinido The font that a program uses by default to display text.
default name nome predefinido The name automatically assigned to an object by a program or process when the user does not specify an alternative.
default zone zona predefinida The zone to which all Macintosh clients on the network are assigned by default.
default value valor predefinido A value that is automatically entered in a field or control when you add a new record. You can either accept the default value or override it by typing a value.
Default device Dispositivo predefinido The device that Communicator uses by default when the user places a call (either PBX phone or Computer via VOIP connection).
default folder pasta predefinida A folder that exists by default in all users’ mailboxes. The Inbox, Outbox, Sent Items, Deleted Items, Calendar, and Contacts folders are default folders.

copiado de:
http://www.microsoft.com/language/en/us/search.mspx