Definitions
noun
an organic process that takes place in the body
“respiratory activity”
noun
the trait of being active; moving or acting rapidly and energetically
“the level of activity declines with age”
noun
a process existing in or produced by nature (rather than by the intent of human beings)
“volcanic activity”
noun
any specific behavior
“they avoided all recreational activity”
noun
the capacity of a substance to take part in a chemical reaction
“catalytic activity”
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