This definition

thĭs
Frequency:
(informal) Used as a substitute for the indefinite article.

Looking for this book of recipes.

adjective
25
7
The person or thing mentioned or understood.

This is John; this tastes good.

pronoun
13
5
Being about to be stated or described.

Just wait till you hear this story.

adjective
9
4
Being just mentioned or present in space, time, or thought.

She left early this morning.

adjective
7
3
Designating the less remote in thought of two contrasted things.

Of the two, this possibility is more likely than that.

adjective
8
5
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This is used to reference a person or a thing.

An example of this is someone talking about and pointing at a plant which they are holding.

pronoun
5
2
Designating the thing that is nearer than the one referred to as “that”

This desk is smaller than that one.

adjective
4
1
To this extent; so.

Never stayed out this late.

adverb
5
3
The less remote in thought of two contrasted things.

Of the two possibilities, this is more likely than that.

pronoun
5
3
Being nearer or more immediate.

This side and that side.

adjective
4
2
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To this extent; so.

It was this big.

adverb
4
2
This means so.

An example of this used as an adverb is the phrase "this big" being spoken as someone holds their hands a foot apart implying how big of a box they need.

adverb
3
1
Used to indicate the nearer or the more immediate one.

This is mine and that is yours.

pronoun
3
2
Used to refer to the present event, action, or time.

Said he'd be back before this.

pronoun
3
2
Designating something that is being, or is about to be, mentioned, presented, etc.

Hear this song; this fact will convince you.

adjective
3
2
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(informal) Designating a particular but unspecified person or thing.

There's this lady in Iowa.

adjective
3
2
The (thing) here (used in indicating something or someone nearby).

This classroom is where I learned to read and write.

determiner
3
2
The known (thing) (used in indicating something or someone just mentioned).

They give the appearance of knowing what they're doing. It's this appearance that lets them get away with so much.

determiner
3
2
The known (thing) (used in indicating something or someone about to be mentioned).

When asked what he wanted for his birthday, he gave this reply: “[...]"

determiner
2
1
Used to refer to the person or thing present, nearby, or just mentioned.

This is my cat. These are my tools.

pronoun
2
2
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Used to refer to what is about to be said.

Now don't laugh when you hear this.

pronoun
2
2
A known (thing) (used in first mentioning a person or thing that the speaker does not think is known to the audience). Compare with "a certain ...".

I met this woman the other day who's allergic to wheat. I didn't even know that was possible!

There's just this nervous mannerism that Bob has with his hands, and it drives me crazy.

determiner
2
2
(Of a unit of time) Which is current.

It snowed this week.

determiner
2
2
The thing, item, etc. being indicated.

This is the excellent foppery of the world, that, when we are sick in fortune,"”often the surfeit of our own behaviour,"”we make guilty of our disasters the sun, the moon, and the stars [...] "” Shakespeare, King Lear, Act 1. Scene 2.

pronoun
2
2
(philosophy) Something being indicated that is here; one of these.
noun
2
2
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Designating the person or thing mentioned or understood.

This man was John; this pie tastes good.

adjective
1
3
To the degree or extent indicated.

I need this much water.

We've already come this far, we can't turn back now.

adverb
1
3
(Internet slang) Indicates the speaker's strong approval or agreement with the previous material.
interjection
1
3
The thing that is nearer than another referred to as “that”

This is larger than that.

pronoun
1
4
The fact, idea, etc. that is being, or is about to be, mentioned, presented, etc.

This convinces us; now hear this.

pronoun
1
4
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Other Word Forms

Noun

Singular:
this
Plural:
these, thises

Origin of this

  • Middle English from Old English to- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • Middle English, from Old English þis (neuter demonstrative), from North Sea Germanic base *þa-, from Proto-Germanic *þat, from Proto-Indo-European *tód, extended form of demonstrative base *to-; + North Sea Germanic definitive suffix -s, from Proto-Indo-European *só (“this, that").

    From Wiktionary