An abstract archetype of a given thing, compared to which real-life examples are seen as imperfect approximations; pure essence, as opposed to actual examples.
A conception in the mind of something to be done; a plan for doing something, an intention.
A purposeful aim or goal; intent
A musical theme or melodic subject.
More generally, any result of mental activity; a thought, a notion; a way of thinking.
An image of an object that is formed in the mind or recalled by the memory.
A vague or fanciful notion; a feeling or hunch; an impression.
Aristotelian: undeveloped potentiality subject to change and development; formlessness. Matter receives form, and becomes substance.
Matter made up of normal particles, not antiparticles.
An affair, condition, or subject, especially one of concern or (especially when preceded by the) one that is problematic.
The basic structural component of the universe, usually having mass and volume.
An approximate amount or extent.
Printed material, especially in books or magazines.
A kind of substance.
To be important.
To care about, to mind; to find important.