Strictly speaking, Blank Verse is a poem written in lines of iambic pentameter, however many poets relax this to decasyllabic lines, and why not, indeed. Blank verse poems can be in one stanza or broken into various stanzas of the line length the poet wishes. There is no rhyme scheme.
Example: Riverside by Terry Clitheroe
Not long ago as we strolled along the river
Arms around each other in the falling rain
Moving along slowly, unhurried, in love.
Wet hair gleaming like burnished copper
Laughing, seeing how close your clothes cling.
Stopping, sheltering, aroused, pressing, hiding,
Against a tree after our first kiss I looked
Two swirling voids that make my heart sing
The mirrors of your soul, touched by mine
I looked deep, deep into your very heart
And saw your love, saw everything offered
And knew then, that from this moment in time
You were mine forever, my soul, my mate
Looking at me, I knew you felt the same.