All significant antonyms

adj significant

• insignificant — unimportant, trifling, or petty: Omit the insignificant details.
• trivial — of very little importance or value; insignificant: Don't bother me with trivial matters.
• unimportant — of much or great significance or consequence: an important event in world history.
• meaningless — without meaning, significance, purpose, or value; purposeless; insignificant: a meaningless reply; a meaningless existence.
• minor — lesser, as in size, extent, or importance, or being or noting the lesser of two: a minor share.
• inconsequential — of little or no importance; insignificant; trivial.
• ordinary — of no special quality or interest; commonplace; unexceptional: One novel is brilliant, the other is decidedly ordinary; an ordinary person.
• little — small in size; not big; not large; tiny: a little desk in the corner of the room.
• small — of limited size; of comparatively restricted dimensions; not big; little: a small box.
• dull — not sharp; blunt: a dull knife.
• unnoticeable — attracting notice or attention; capable of being noticed: a noticeable lack of interest.