Producing a desired or intended result. adjective
The new advertising campaign was highly effective in boosting sales.
Her speech was effective in convincing the audience to support the cause.
In operation or in force; functioning. adjective
The new law becomes effective next month.
The policy is effective immediately upon announcement.
Impressive or striking in appearance. adjective
The effective use of color in the painting draws the viewer's attention.
The actor's performance was effective, leaving a lasting impression on the audience.