A (romantic) date that two couples go on together.
To go on a double date.
An affair, condition, or subject, especially one of concern or (especially when preceded by the) one that is problematic.
Matter made up of normal particles, not antiparticles.
Aristotelian: undeveloped potentiality subject to change and development; formlessness. Matter receives form, and becomes substance.
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.