To hold something up over one's head; to hold aloft.
日差しが強かったので、傘をかざして歩いた。
The sun was strong, so I walked holding an umbrella over my head.
観客が優勝旗をかざして選手を迎えた。
The spectators held up the championship flag to welcome the players.
子どもがぬいぐるみを頭の上にかざして見せた。
The child showed off the stuffed toy by holding it above their head.
To hold something over or toward something (e.g., hold out one's hands toward a fire); to cover or place something over another object.
冷えた手を火にかざして温めた。
I warmed my cold hands by holding them near the fire.
タオルを鍋の上にかざして湯気を防いだ。
I held a towel over the pot to block the steam.
To hold something up to shield one's eyes or face from the sun (to shade).
強い日差しに手をかざして目を守った。
I shaded my eyes with my hand from the strong sunlight.
写真を撮るとき、彼女は帽子のつばをかざして顔を隠した。
When taking the photo, she shaded her face with the brim of her hat.