Noun
(uncountable) An organizational structure in which competing interests of equal power negotiate with each other.
(countable) A scheme for how nations work together or compete, such as multilateralism, bilateralism, unilateralism, etc.
(medicine) Dominance or specialization by one side of the body; lateralization.
Lateral thinking; the process of approaching a subject from multiple sides, or an instance of this process.
Source: en.wiktionary.org