Poetry uses forms and conventions to suggest differential interpretation to words, or to evoke emotive responses. Devices such as assonance, alliteration, onomatopoeia and rhythm are sometimes used to achieve musical or incantatory effects.
The average speed of an object tells you the (average) rate at which it covers distance. If a car's average speed is 65 miles per hour, this means that the car's position will change (on the average) by 65 miles each hour.
Average speed is defined as the total distance travelled divided by the total time taken. Average speed is a scalar quantity. $Average\ Speed$ = $\frac{Total\ distance\ travelled}{Total\ time\ taken}$. The velocity of an object is defined as the displacement divided by the time internal during which the displacement occurred. Since displacement is a vector quantity, average velocity is also a vector quantity.