Can "senor" mean aged over 18?
Can "senor" mean someone who is over 18 years of age, e.g. el matrimonio contraido entre los senores...
When the word, Señor is used:
Used as a courtesy title before the surname, full name, or professional title of a man in a Spanish-speaking area.
Used as a form of polite address for a man in a Spanish-speaking area.
A Spanish or Spanish-speaking man.
What all these definitions have in common is that they are all used for a male- a man so the assumption could be made that this term would apply to an individual over the age of 18 but, different cultures have different ages for when a boy reaches, 'manhood'. What you've also mentioned is a husband and wife. In this case, the husband would be a 'señor' in this context (in my opinion) because he has a responsibility for the wellbeing of his wife, and is therefore a man.
el matrimonio contraido entre los señores could be an arranged marriage by two fathers
No, un matrimonio contraido is a wedded couple, of any sex.
I'm curious: How do you informally address a male teenager?
"¿Hola, Joven?" At what age does "muchacho" become inappropriate?
(Of course, I address a female teen as "Señorita.)
Can a couple of the same sex obtain a marriage license in Europe? I doubt it that a homosexual couple can get married in Guatemala I am sure that in Mexico city a gay couple are allowed to get a license,but not in the rest of Mexico. Here in "America"some states do allowed couples of any sex to get married. P.S. see Heidita's comment
You've managed to get 18+ views on this thread.
Could we get some more context? Spanish has the custom of referring to a group of female and male persons by a masculine noun.
Los señores could be referring to un señor y una señora or dos señores (gentlemen).
Los señores Fulano=Mr. & Mrs. Fulano.....
los señores=Mr. so and so and Mr. Fulano
el matrimonio contraido entre los señores could be an arranged marriage by two fathers or between a man and a woman...a marriage contract between husband and wife...
Knowing the rest of the sentence would be very illuminating.