adj · noun · verb · 5 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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Received-Pronunciation:/pɹiːˈɔːdə/
Canada, General-American:/ˈpɹiˌoɹdɚ/most common
Canada, General-American:/ˌpɹiˈoɹdɚ/
US:Recorded audio is listed in the source snapshot.
Australian, New-Zealand:/pɹiːˈoːdə/
1
adj
Meaning 1
Such that, recursively, the root is visited before the left and right subtrees.
Definition source: English Wiktionary via Wiktextract
2011, Ananda Rao Akepogu, Radhika Raju Palagiri, Data Structures and Algorithms Using C++, Pearson Education India, page 9.16, The preorder traversal visits a node first after which it traverses its left subtree and then traverses its right subtree.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
noun
Meaning 2
An order for goods or services placed in advance.
Definition source: English Wiktionary via Wiktextract
Examples
available for preorder
Head over to website.com and get your preorder in.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
noun
Meaning 3
A binary relation that is reflexive and transitive.
Definition source: English Wiktionary via Wiktextract
The relation of logical implication over sentences is an example of a preorder.
2000, Jean-Charles Pomerol, Sergio Barba-Romero, Multicriterion Decision in Management: Principles and Practice, Springer, Softcover, page 58, It can easily be verified that the above relation is a preorder, i.e. that it is reflexive and transitive.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
4
verb
Meaning 4
To order (goods or services) in advance, before they are available.
Definition source: English Wiktionary via Wiktextract
Usage: intransitive, transitive
Examples
Preorder now at website.com!
Meaning relationships
Synonyms: none provided
Antonyms: none provided
5
verb
Meaning 5
To sort or arrange beforehand.
Definition source: English Wiktionary via Wiktextract
Usage: transitive
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
History
Etymology
Etymology tree Proto-Indo-European *per- Proto-Indo-European *preh2- Proto-Indo-European *-i Proto-Indo-European *préh2i? Proto-Italic *prai Proto-Italic *prai- Latin prae-lbor. Middle English pre- English pre- Proto-Indo-European *h2er-der. Proto-Italic *ordōder. Latin ōrdinem Old French ordneder. Middle English ordre English order English preorder From pre- + order.
Across languages
Translations
20 source translations are retained for this English entry.
Bulgarian:
предвари́телна поръ́чка
(predvarítelna porǎ́čka)
— order in advance
Finnish:
ennakkotilaus
— order in advance
German:
Vorbestellung
— order in advance
Greek:
προπαραγγελία
(proparangelía)
— order in advance
Macedonian:
преднарачка
(prednaračka)
— order in advance
