Obtrusive, a.
Disposed to obtrude; inclined to intrude or thrust one's self or one's opinions upon others, or to enter uninvited; forward; pushing; intrusive. -- Ob*tru"sive*ly, adv. -- Ob*tru"sive*ness, n. Not obvious, not obtrusive, but retired. Milton.
Shades of meaning
Fernald has no entry of its own for obtrusive; he lists it under meddlesome.
Where he writes about it:
The meddlesome person interferes unasked in the affairs of others; the intrusive person thrusts himself uninvited into their company or conversation; the obtrusive person thrusts himself or his opinions conceitedly and undesirably upon their notice; the officious person thrusts his services, unasked and undesired, upon others. — from meddlesome
Obtrusive is oftener applied to words, qualities, actions, etc., than to persons; intrusive is used chiefly of persons, as is officious, tho we speak of officious attentions, intrusive remarks; meddlesome is used indifferently of persons, or of words, qualities, actions, etc. — from meddlesome