English > periodical: 2 senses > adjective 1| Meaning | happening or recurring at regular intervals. |
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| Synonym | periodic |
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| Narrower | annual, yearly | Occurring or payable every year |
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| biennial, biyearly | Occurring every second year |
| bimonthly, bimestrial | Occurring every two months |
| cyclic | marked by repeated cycles |
| daily, day-to-day, day-by-day, day-after-day | Of or belonging to or occurring every day |
| diurnal | Having a daily cycle or occurring every day |
| fortnightly, biweekly | Occurring every two weeks |
| half-hourly | Occurring ever half hour |
| hourly | Occurring every hour or payable by the hour |
| midweekly | Occurring during the middle of the week |
| monthly | Of or occurring or payable every month |
| nightly | Happening every night |
| oscillatory, oscillating | Having periodic vibrations |
| semestral, semestrial | Occurring every six months or during every period of six months |
| semiannual, biannual, biyearly, half-yearly | Occurring or payable twice each year |
| semimonthly, bimonthly | Occurring twice a month |
| semiweekly, biweekly | Occurring twice a week |
| triennial | Occurring every third year or lasting 3 years |
| weekly, hebdomadal, hebdomadary | Of or occurring every seven days |
| Opposite | aperiodic, nonperiodic | not recurring at regular intervals |
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| Spanish | periódico |
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| Catalan | periòdic |
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| Nouns | period | the interval taken to complete one cycle of a regularly repeating phenomenon |
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| periodical | a publication that appears at fixed intervals |
| Adverbs | periodically | in a sporadic manner |
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