Frail, sickly or of a delicate constitution; weak.

With little strength or force.

(obsolete) The quality of being weakly.

Exhibiting or characteristic of weak cardinality

(of a topological space) Having all its homotopy groups trivial.

(computing) belonging to a type system that likely would not result in an error, if the variable passed does not closely match the expected type.

(physics) A predicted very high-energy state of matter, present in the very early universe for perhaps 10⁻¹² seconds after the Big Bang, when strong, weak, and electromagnetic forces were undistinguished.

(astronomy, physics) A hypothetical class of particle, proposed to explain the dark matter problem.

plural of weakly interacting massive particle

(particle physics) a candidate type of dark matter which are weakly interacting massive particles that result from supersymmetry, being supersymmetric particles