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.