Many are partly to entirely black, often with iridescence or bright markings of some sort. Most blackbird species form flocks at certain times of the year, and many form multispecies flocks. Blackbirds live in open habitats and eat seeds, grain, and insects.
The definition of a trepidation is a trembling movement, fear or nervousness. 1  An example of trepidation is when a speaker's hands are shaking due to nerves while giving a speech. 2  An example of trepidation is an anxious feeling before the first day of college.
Wiktionary(5.00 / 1 vote)Rate this definition: 1  opacity(Noun) The state or quality of being opaque, not allowing light to pass through. 2  opacity(Noun) The state or quality of being inaccessible to understanding. 3  opacity(Noun) A measure of relative impenetrability to electromagnetic radiation such as light.