1. a following of one thing after another in time;
"the doctor saw a sequence of patients"
2. a group of people or things arranged or following in order;
"a succession of stalls offering soft drinks"
"a succession of failures"
3. the action of following in order;
"he played the trumps in sequence"
4. (ecology) the gradual and orderly process of change in an ecosystem brought about by the progressive replacement of one community by another until a stable climax is established