is

Etymology 1

From Middle English is, from Old English is, from Proto-West Germanic *ist, from Proto-Germanic *isti (a form of Proto-Germanic *wesaną (“to be”)), from Proto-Indo-European *h₁ésti (“is”). Cognate with West Frisian is (“is”), Dutch is (“is”), German ist (“is”), Afrikaans is (“am, are, is”) Old Swedish är, er, Old Norse er, es. Also, via Proto-Indo-European, Latin esse (“be”)

verb

1. third-person singular simple present indicative of be
   He is a doctor.
   "It depends on what the meaning of the word 'is' is." 8 January 1999, Ken Starr, quoting Bill Clinton, Referral from Independent Counsel Kenneth W. Starr in Conformity with the Requirements of Title 28, United States Code, Section 595(c) (Starr Report), Washington, D.C.: U.S. Government Printing Office, retrieved 2020-02-14, page 176
   "It's not two weeks yet," I reminded her, hoping that might somehow cheer her. … "Tomorrow is two weeks," Ruth said in a distant voice, staring into the flames. 2012, Robert Moore, Where the Gold is Buried, a legend of Old Fort Niagara, page 137
2. (now colloquial) Used in phrases with existential there when the semantic subject is a third-person plural.
   There is three of them there.

Etymology 2

Eye dialect spelling of us.

pron

1. (Tyneside) Alternative spelling of us (“me”).

Etymology 3

i + -s.

noun

1. (rare) Alternative form of i's.