Especially of language: powerfully and forcibly expressive; spoken with force or emphasis.

Of an action, attribute, argument, etc.: strongly marked; powerful, forceful.

Of a person: = "emphatic".

Of a word, syllable, etc.: that bears the stress in pronunciation. Also of a word: that has particular importance in a sentence.

Designating colours that are not inherent in an object, such as those produced by a prism or seen in a rainbow, regarded as being less real than colours seen on the surface of something.