An official count or enumeration of members of a population (not necessarily human), usually residents or citizens in a particular region, often done at regular intervals.
Count, tally.
To collect a census.
To conduct a census on.
The subset of those members of a specific group who are present or available out of the full set of all the members of said group.
The time of day fixed for such an event.
Such an event in a legislative body in order to determine if a quorum exists.