Era
An era is a span of time defined for the purposes of chronology or historiography, as in the regnal eras in the history of a given monarchy, a calendar era used for a given calendar, or the geological eras defined for the history of Earth.
Comparable terms are epoch, age, period, saeculum, aeon (Greek aion) and Sanskrit yuga.
Era (noun)
A time period of indeterminate length, generally more than one year.
Era (noun)
A unit of time, smaller than eons and greater than periods.
Period (noun)
A length of time. from 17th c.
“There was a period of confusion following the announcement.”
“You’ll be on probation for a six-month period.”
Period (noun)
A period of time in history seen as a single coherent entity; an epoch, era. from 16th c.
“Food rationing continued in the post-war period.”
Period (noun)
The punctuation mark “.” (indicating the ending of a sentence or marking an abbreviation).
Period (noun)
The length of time during which the same characteristics of a periodic phenomenon recur, such as the repetition of a wave or the rotation of a planet. from 17th c.
Period (noun)
Female menstruation. from 18th c.
“When she is on her period, she prefers not to go swimming.”
Period (noun)
A section of an artist’s, writer’s (etc.) career distinguished by a given quality, preoccupation etc. from 19th c.
“This is one of the last paintings Picasso created during his Blue Period.”
Period (noun)
Each of the divisions into which a school day is split, allocated to a given subject or activity. from 19th c.
“I have math class in second period.”
Period (noun)
Each of the intervals into which various sporting events are divided. from 19th c.
“Gretzky scored in the last minute of the second period.”
Period (noun)
The length of time for a disease to run its course. 15th-19th c.
Period (noun)
An end or conclusion; the final point of a process etc. from 16th c.
Period (noun)
A complete sentence, especially one expressing a single thought or making a balanced, rhythmic whole. from 16th c.
Period (noun)
A specific moment during a given process; a point, a stage. 17th-19th c.
Period (noun)
A row in the periodic table of the elements. from 19th c.
Period (noun)
A Appendix: Geologic timescale.
Period (noun)
A Drosophila gene, the gene product of which is involved in regulation of the circadian rhythm.
Period (noun)
Two antecedent and a consequent phrase).
Period (noun)
The length of an interval over which a periodic function, periodic sequence or repeating decimal repeats; often the least such length.
Period (noun)
End point, conclusion.
Period (adjective)
Designating anything from a given historical era.
“a period car”
“a period TV commercial”
Period (adjective)
Evoking, or appropriate for, a particular historical period, especially through the use of elaborate costumes and scenery.
Period (interjection)
That’s final; that’s the end of the matter (analogous to a period ending a sentence).
“I know you don’t want to go to the dentist but your teeth need to be checked, period!”
Period (verb)
To come to a period; to conclude.
Period (verb)
To put an end to.