Sixteen is the number after fifteen. Four squared, and two to the power of four.
In Britain it is the age of a great many thresholds at once, since school-leaving, marrying with consent and the age of consent all fall there, which makes it one of the most legally significant birthdays. Computing likes it because it is a power of two, which is why colours, memory sizes and hexadecimal all work in sixteens. Sweet sixteen is the American celebration.
1nounsixteenThe number after fifteen.
“He left school at sixteen and never went back.”
Proto-Germanic
*sehstehun
Old English
sixtīene
Middle English
sextene
English, today
sixteen
Middle English sextene, sixtene, from Old English sixtīene, from Proto-Germanic sehstehun. Cognate with West Frisian sechstjin, Dutch zestien, German sechzehn, Danish seksten. Equivalent to six + -teen.
Etymology from Wiktionary, CC BY-SA