1. A long time: This won't take long. 2. Linguistics A long syllable, vowel, or consonant. 3. One who acquires holdings in a security or commodity in expectation of a rise in price. LONG definition: 1. continuing for a large amount of time: 2. being a distance between two points that is more than…. Learn more. long, yearn, hanker, pine, hunger, thirst mean to have a strong desire for something. long implies a wishing with one's whole heart and often a striving to attain. yearn suggests an eager, restless, or painful longing. hanker suggests the uneasy promptings of unsatisfied appetite or desire. Learn what long means with clear definitions, pronunciation, synonyms, and real-world examples. Simple explanations to help you use long correctly. The adjective long describes something that stretches over a large distance. If you're trying to avoid a prolonged visit with your crazy Aunt Martha, you might decide to take the long way to her house. Copy and paste Long Dash Symbol (—). Check Alt Codes and learn how to make specific symbols on the keyboard. Long is used in expressions such as all year long, the whole day long, and your whole life long to say and emphasize that something happens for the whole of a particular period of time. Tired of saying long? This list of 100 vivid alternatives adds precision and style to your writing, including a few surprising picks you will want to steal. LONG Building Technologies provides building automation, security systems, commercial HVAC service and parts, as well as building analytics. Wide may be used instead of long when referring to a left-to-right horizontal dimension, or to a horizontal dimension shorter than that described as long (for example, a river that is wide and long).