The Duchess of Sussex said she “doesn’t look at Twitter” during her first appearance as vice-president of the Queen's Commonwealth Trust on International Women’s Day.
Meghan Markle also joked about the movements of her unborn baby, during the panel on female empowerment, but insisted the couple are keeping the baby’s sex a secret.
The panel, held at King’s College London, also featured Australian former Prime Minister Julia Gillard, Model and Gurls Talk founder Adwoa Aboah and pop star campaigner Annie Lennox.
When asked by chairwoman Anne McElvoy "how's the bump treating you?" she replied "very well" and said she had been watching a "documentary about feminism on Netflix and one of the things they said during pregnancy was 'I feel the embryonic kicking of feminism'."
She told the audience: "I loved that - boy or girl, whatever it is, we hope that's the case."
Asked by the panel chairwoman about the selling of feminism to men and boys, Meghan replied: "I've said for a long time you can be feminine and a feminist, you can be masculine.
"And I think in terms of masculinity you understand that your strength includes knowing your vulnerabilities and your sense of self and security, and your confidence comes from knowing a woman by your side, not behind you, is actually something you should not be threatened about - as opposed you should feel really empowered in having that."
When asked if she looked at Twitter she replied: "No, sorry no. For me that's my personal preference.
Meghan was asked by the chairwoman how she responded to newspaper headlines describing her feminism as "trendy" and whether it was "water off a duck's back".
The Duchess said: "I don't read anything, it's much safer that way, but equally that's just my own personal preference because I think positive or negative it can all sort of just feel like noise to a certain extent these days, as opposed to getting muddled with that to focus on the real cause.
"So for me I think the idea of making the word feminism trendy, that doesn't make any sense to me personally, right? This is something that is going to be part of the conversation forever."
Her new role is alongside husband Harry, who is president of the body, and the Queen, who is patron.
Her comment comes just days after Buckingham Palace declared war on the trolls who post vile comments on the Royal Family’s social media accounts - warning that the worst offenders will be reported to the police.
In a rare intervention, senior courtiers published rules for posts in a bid to create “a safe environment” on all social media channels run by The Royal Family, Clarence House and Kensington Palace.
The move follows growing alarm about the volume of abusive, and in some cases illegal, attacks on members of the Royal Family, many aimed at the Duchess of Cambridge and the Duchess of Sussex.
The Palace statement said: “We ask that anyone engaging with our social media channels shows courtesy, kindness and respect for all other members of our social media communities.”
The problem is believed to have exploded to unprecedented levels since last May’s royal wedding with palace staff having to spend hours moderating abusive comments, which in the most extreme cases have included threats of violence.
In some cases oddball theories have been peddled by trolls such as claims that Meghan has faked her pregnancy.
Kensington Palace first raised concerns over racist social media trolls as far back as November 2016, when Meghan and Harry began dating.
