To play, frolic, or gambol (used for children, animals, or people enjoying light-hearted play).
子犬たちが庭で戯れている。
The puppies are frolicking in the yard.
休日は公園で子どもと戯れて過ごした。
I spent the holiday playing with my child in the park.
彼らはささいな話題で戯れて笑っていた。
They were joking and laughing over trivial topics.
To flirt with someone; to engage in light, playful romantic or teasing behavior.
彼はバーで初対面の女性と戯れていたが、真剣ではなさそうだった。
He was flirting with a woman he had just met at the bar, but he didn't seem serious.
演劇の中で二人は言葉を交わしながら戯れる場面がある。
In the play there's a scene where the two exchange words and flirt.
An archaic meaning referring to elegance, refinement, or tasteful playfulness; found in classical literature.
古い俳句や随筆で『戯れる』が風流な趣を表す語として使われることがある（古語）。
In old haiku and essays, '戯れる' is sometimes used to express a sense of refined playfulness (archaic).