A formal announcement by a country or other body with military capability that it is in a state of war with another such entity.

The interpretation of the law towards the end of providing justice, even if this interpretation does not fall within the law as written.

(manufacturing, design engineering) A list of materials and components used in a manufactured item, sometimes appended to an engineering diagram of the item.

(idiomatic, transitive) To realise the maximal value, worth, or potential of (something); to derive as much benefit or profit from (something) as is possible.

The trust-inspiring sound, tenor, or impression of being truthful.

(idiomatic) A heart (or by extension, person) in a very fragile romantic state, one that is easily made broken-hearted.

(idiomatic, slang) The entire or overall plan, concept or action. / (idiomatic, slang) Everything of a similar or related nature; everything necessary for a particular purpose.

(idiomatic) A shortcut or other quick, or very effective way of doing things, that professional workers learn from experience.

plural of trick of the trade

(transitive, US, military) To pull the pin from a grenade and wait two or three seconds before throwing.