Printed material, especially in books or magazines.
Matter made up of normal particles, not antiparticles.
Aristotelian: undeveloped potentiality subject to change and development; formlessness. Matter receives form, and becomes substance.
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.
A kind of substance.
To be important.
To care about, to mind; to find important.
A data file containing only plain, human-readable text, distinct from documents with embedded formatting
A data file in a character encoding that allows it to be read in non-specialised text editor.