To order something; to submit an order for a product.

(anatomy) The groove between the buttocks.

(idiomatic) compensation for injury caused by a person, in the form of inflicting of an identical injury on that person.

(linguistics) The process of relating syntactic structures, from the levels of phrases, clauses, sentences and paragraphs to the level of the writing as a whole, to their language-independent meanings, removing features specific to particular linguistic and cultural contexts, to the extent that such a project is possible.

(artificial intelligence, statistics) The classification of objects into different groups, or more precisely, the partitioning of a data set into subsets (clusters), so that the data in each subset (ideally) share some common trait - often proximity according to some defined distance measure.

In order to achieve something, some sacrifices or mistakes are inevitable.

To contribute toward a group effort.

To bid or propose; to initiate a proposal.

(philosophy) The analysis of concepts, including, for a given concept, the search for its definition.

Usually said in a situation when the rule is incorrect and unusable.