An agreement of situations or objects with an expected outcome.
A relation.
Reciprocal exchange of civilities, especially conversation between persons by means of letters.
Postal or other written communications.
Newspaper or news stories.
A similarity between physical and spiritual things (e.g. light to wisdom, or warmth to love)
The act or process of equating two or more things, or the state of those things being equal (that is, identical).
An assertion that two expressions are equal, expressed by writing the two expressions separated by an equal sign; from which one is to determine a particular quantity.
A small correction to observed values to remove the effects of systematic errors in an observation.