A person of weak or even sickly physical constitution / (figuratively) A person of weak character, lacking in courage and/or moral strength.

(military, notably USMC) Any weapon system that requires a crew or more than one individual to function due to its high operational complexity.

(obsolete) Weather, especially favourable or fair weather. / (geology) Mechanical or chemical breaking down of rocks in situ by weather or other causes.

present participle of weather

(transitive) To make weaker or less strong. / (intransitive) To become weaker or less strong.

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

(idiomatic) One who is friendly, helpful, or available only when it is advantageous or convenient to be so.

(meteorology) The science of using meteorology to predict future weather.

plural of wedding vow

Tiresome, tedious or causing fatigue.