With reference to the time of day. Belonging to the first part of the morning; that exists, takes place, appears, or does something at the beginning…

Belonging to or forming the first part of a period of time; esp. early in the day, belonging to the dawn or morning.

Of or relating to the morning, esp. the period just after waking; occurring or performed early or in the morning.

= matutinal, adj. 1.

With the sense ‘of, relating to, or belonging to the morning; existing or occurring during the morning’.

Of or relating to the hours before midday; belonging or appropriate to the morning or forenoon.

Early.

figurative. poetic. Designating dawn or the early morning.

With the sense ‘belonging to the early morning, matutinal’.

pre-breakfast.

= matutinal, adj. 1.

Matutinal, early.

Held or occurring before lunch.