Verb

(defin)

To determine with precision; to mark out with distinctness; to ascertain or exhibit clearly.

* Sir (Isaac Newton)

Ringsvery distinct and well defined .

*{{quote-magazine, year=2013, month=July-August, author= Lee S. Langston

, title= The Adaptable Gas Turbine , passage=Turbines have been around for a long time—windmills and water wheels are early examples. The name comes from the Latin turbo'', meaning ''vortex , and thus the defining property of a turbine is that a fluid or gas turns the blades of a rotor, which is attached to a shaft that can perform useful work.}}

(obsolete) To settle, decide (an argument etc.).

* 1596 , (Edmund Spenser), (The Faerie Queene) , IV.3:

These warlike Champions, all in armour shine, / Assembled were in field the chalenge to define .

To express the essential nature of something.

*{{quote-magazine, year=2013, month=May-June, author=

, volume=101, issue=3, page=178, magazine=(American Scientist) , title= Crinkly Curves , passage=Cantor defined a one-to-one correspondence between the points of the square and the points of the line segment. Every point in the square was associated with a single point in the segment; every point in the segment was matched with a unique point in the square.}}

To state the meaning of a word, phrase, sign, or symbol.

To describe, explain, or make definite and clear.

To demark sharply the outlines or limits of an area or concept.

*{{quote-magazine, year=2012, month=March-April, author=(Jan Sapp)

, volume=100, issue=2, page=164, magazine=(American Scientist) , title= Race Finished , passage=Few concepts are as emotionally charged as that of race. The word conjures up a mixture of associations—culture, ethnicity, genetics, subjugation, exclusion and persecution. But is the tragic history of efforts to define groups of people by race really a matter of the misuse of science, the abuse of a valid biological concept?}}

(mathematics) To establish the referent of a term or notation.

Verb

To establish the identity of someone or something.

*

(biology) To establish the taxonomic classification of an organism.

*

To equate or make the same; to unite or combine into one.

* D. Ramsay

Every precaution is taken to identify the interests of the people and of the rulers.

* Burke

Let us identify , let us incorporate ourselves with the people.

(reflexive) To have a strong affinity (with); to feel oneself to be modelled on or connected to.

* 1999 , Joyce Crick, translating Sigmund Freud, The Interpretation of Dreams , Oxford 2008, p. 117:

The dream is given a new interpretation if in her dream she means not herself but her friend, if she has put herself in the place of her friend, or, as we may say, she has identified herself with her.

To associate oneself with some group.

*

To claim an identity; to describe oneself as a member of a group; to assert the use of a particular term to describe oneself.

* {{quote-magazine

, year=2010 , author= , title=Youth Who Self-Identify as Gay, Lesbian or Bisexual at Higher Suicide Risk, Say Researchers , date=Feb. 6, 2010 , magazine=Science Daily citation , passage="The main message is that it's the interface between individuals and society that causes students who identify as gay, lesbian, or bisexual the most distress," said study first author Yue Zhao. }}