While Stotras are verses praising the deity, Dhyana Slokas describe the deity and help the devotee to bring the deity in his/her mind and proceed with meditation. There are several Dhyana Slokas for each deity, I have selected in most cases one of them and presented here along with its meaning.
Bhogheendrabhadha bhoosham, bhajatha ganapathim, rakthavasthrangaragam.
And who wears ornaments of snakes, red cloths and red marks on his forehead.
And who is great, brilliant and perennially flawless.
Ramam rakshasa dhoomakethumanisam vande dasasyanthakam.
Viswamithra parasaradhi munibhi samsthooyamanam Bhaje.
Served by all monkey groups lead by Sugreeva.
And who is the cowherd who protects all beings.
Smasru prasphurithananam surathanum ramam sada saswatham.
Who is having a great shine in his face and who is being praised by Devas.
Nanalangara deeptham sphatikamani nibham parvatheesam namami.
And who has a luster of the crystal ball.
With many varied shining ornaments.
Varanaasi pura pathim bhaje viswa natham.
Nithyam saa padmahastha mama vasathu gruhe sarva mangalya yuktha.
Who is slightly bent due to her heavy breasts.
And using pots of gold and who keeps in her hand flowers of lotus.
Sri chakra sthitha sundarim trijagathamadara bhootham smareth.
And who is the pretty goddess who sits on the Sri Chakra.
Animadhibhi-ravrutham mayukai-raha mityeva vibhavaye Bhavanim.
As personification of the concept of aham.
Who has pair of busts like the pot held by the king of snakes.
Who is a great sage and who was born with Vedas.
Chakram sankhamadharavindayugalam hasthair vahantheem bhaje.
And who sits on a white lotus flower.
Udhwandhasachakravalam kapivaramanisam vayu puthram namami.
Removes all the darkness from the horizon ad who is a great monkey.
Lokathpathi vinasa palanakaram Soorym gunabdhim bhaje.
And who is responsible for creation, upkeep and destruction of the world.
Sasyankasthamyagothidasraya gunam somam sudhabhdhim bhaje.
And who exhibits his affection by the rabbit which he keeps on his lap.
Meror divya girai pradakshinakaram, sevamiha tham kujam.
And who perambulates the holy mountain of Meru.
Meror divya giraipradakshinakaram Sevamahe tham budham.
And who goes round and round the Maha Meru mountain.
Vidhya sagara paragam suragurum vande suvarna prabham.
And who has seen the other shore of the sea of wisdom.
Shukram daithya vararchitham smithamukham vande sithangaprabham.
And who gives boons to the Rakshasas.
Deergasmasrujatayudham grahapathim souram sadaham bhaje.
Colour like a blue stone, who sits on a blue lotus flower.
Who is fearsome and who has long beard and hair.
Sri poornapushkalabhyam puraharamurajith puthrakapathu sastha.
With his two wives Poorna and Pushkala in the throne of Yoga.
And who holds the bow with arrow ready to shoot, in his hands.
Kanchi kankana kinkini ravayutham srungara sarodhayam.
And is the essence of the feeling of romance.