1 [count] : the usual attitude or mood of a person or animal
He always had a cheerful/nervous disposition. [=temperament, personality]
It's nice to work with someone who has such a sunny disposition. [=who is usually cheerful]
a dog with an excellent disposition
a [singular] : a tendency to act or think in a particular way
Her disposition was to always think negatively.
He has a disposition toward criminal behavior.
b [count] : a tendency to develop a disease, condition, etc.
people with a genetic disposition toward a particular disease
3 formal : the act or power of officially or legally giving land, possessions, etc., to someone
the philanthropist's charitable dispositions [=(less formally) donations]
A will is a legal document that is used in the disposition of property.
4 [count] formal : the way things are placed or arranged — usually singular — often + of
The map showed the disposition of troops on the border.