The distinguishing characteristic of a person or thing, understood as its general class, sort, type, etc.
Spontaneous love, affection, or reverence, especially between parent and child.
The essential or innate characteristics of a person or thing which will always tend to manifest, especially in contrast to specific contexts, reason, religious duty, upbringing, and personal pretense or effort.
The need to urinate and defecate.
Sexual desire.
The way things are, the totality of all things in the physical universe and their order, especially the physical world in contrast to spiritual realms and flora and fauna as distinct from human conventions, art, and technology.
The vital functions or strength of someone or something, especially (now dialect) as requiring nourishment or careful maintenance or (medicine) as a force of regeneration without special treatment.
The quality of being varied; diversity.
A rank in a taxonomic classification below species and (if present) subspecies, and above form; hence, an organism of that rank.
The total number of distinct states of a system; also, the logarithm to the base 2 of the total number of distinct states of a system.
An animal or plant (or a group of such animals or plants) with characteristics causing it to differ from other animals or plants of the same species; a cultivar.
In universal algebra: an equational class; the class of all algebraic structures of a given signature, satisfying a given set of identities.
A specific form of a language, neutral to whether that form is an accent, dialect, register, etc., and to its prestige level; an isolect or lect.
A collection or number of different things.
The kind of entertainment given in variety performances or shows; also, the production of, or performance in, variety performances or shows.
A deviation or difference.
A stamp, or set of stamps, which has one or more characteristics (such as colour, paper, etc.) differing from other stamps in the same issue, especially if such differences are intentionally introduced.
A specific variation of something.