noun
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.
(historical) A type of tax levied by feudal lords on peasants.
(cellular automata) A count of the number of individual patterns within a larger pattern, most often the ash of a soup or a methuselah.
verb
(transitive) To conduct a census on.
(intransitive) To collect a census.