A moment of silence is a period of silent contemplation, prayer, reflection, or meditation. Similar to flying a flag at half-mast, a moment of silence is often a gesture of respect, particularly in mourning for those who have died recently or as part of a tragic historical event.

Silent prayer and worship, including moments of silence practiced during other group activities have been practiced by Quakers for more than 300 years. Since silence contains no statements or assumptions concerning beliefs and requires no understanding of language to interpret, it is more easily accepted and used than a spoken prayer or observance when persons of different religious and cultural backgrounds participate together. In the colonial period Pennsylvania Quakers and Lenape Native Americans worshiped silently together on several occasions, yet neither group thought that this implied that they had altered their traditional belief system in doing so. Over time, the effectiveness of Quaker-style silence for non-sectarian and non-controversial public observances has led to its almost universal use in the English-speaking world as well as other plural societies. This is also the case within many institutions where diverse groups are expected to participate but not necessarily share beliefs such as in government, schools, businesses and the military.

Moment of silence may refer to:

"Moment of Silence" is a poem by Emmanuel Ortiz published on September 11, 2002, the first anniversary of the September 11th, 2001 attacks. The poem discussed the history of colonialism, neocolonialism, imperialism, the War on Terror, environmental racism, and structural violence as well as the attacks.

The poem begins:

But it goes on to critique that notion of a moment of silence, perhaps best summed up by the lines: "From somewhere within the pillars of power, you open your mouth to invoke a moment of our silence and we are all left speechless" and "This is a poem about what causes poems like this to be written." The majority of the poem serves as a list of historical crimes by the West against indigenous peoples or the Third World and how the structures which perpetuate those crimes slip through the cracks whenever people take a "moment of silence". Essentially, Ortiz believes a moment of silence "cut[s] in line" by failing to acknowledge previous and ongoing forms of structural violence.