prefix

noun

1. Something placed before another

   “The chosen prefixes won the vote in part because they start with the only two letters left in the alphabet that are not already used in measurement. The b for “bronto” is already used for bytes and h for “hella” is used for hecto, the prefix for 100.”

2. Something placed before another

   “in the UK, a number with an 0800 prefix is a toll-free number.”

   “Add the prefix +34 to dial a Spanish number from abroad”

3. Something placed before another
4. Something placed before another

   “The string "abra" is both a prefix and a suffix of the string "abracadabra".”

verb

1. (transitive)To determine beforehand; to set in advance.

   “But the danger was, that a man can hardly prefix any certaine limits unto his desire[…].”

   “It is important to realize that pregivenness or prefixing is a kind of anteriority that does its work in the present; subjects and meanings in part emerge in enuciative co-constitutive moments.”

2. (transitive)To put or fix before, or at the beginning of something; to place at the start.